2. Boost Unordered Translation (zh_Hans)
3. Chinese (Simplified Han script)
4. Zen

352 :1367
	English Effects:;; If the container does not already contain an element with a key equivalent to `k`, inserts the value `std::pair<key_type const, mapped_type>(k, mapped_type())`. Returns:;; A reference to `x.second` where `x` is the element already in the container, or the newly inserted element with a key equivalent to `k`. Throws:;; If an exception is thrown by an operation other than a call to `hasher` the function has no effect. Notes:;; Can invalidate iterators, but only if the insert causes the load to be greater than the maximum load. + + The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 效果：如果容器中不存在键与 `k` 等价的元素，则插入值 `std::pair<key_type const,="" mapped_type="">(k, mapped_type())`。 返回：对 `x.second` 的引用，其中 `x` 是容器中已存在的元素，或是新插入的键与 `k` 等价的元素。 抛出：如果除调用 `hasher` 之外的操作抛出异常，则该函数无效果。 注意：可能使迭代器失效，但仅当插入导致负载大于最大负载时才会发生。 `template<class k="">` 重载仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时参与重载决议。库假定 `Hash` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class></key_type> 429/9020 · 902 Needs editing
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	English Returns:;; A boolean indicating whether or not there is an element with key equal to `k` in the table. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type. + + In the presence of concurrent insertion operations, the value returned may not accurately reflect the true state of the table right after execution.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回值：;; 布尔值，表示表中是否存在键与`k`相等的元素。 备注：;; `template<class k="">` 重载仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时才参与重载决议。标准库假定 `Hash` 可同时接受 `K` 与 `Key` 类型调用，且 `Pred` 是透明的。这实现了异构查找，避免了实例化 `Key` 类型对象的开销。 在存在并发插入操作时，返回的值可能无法准确反映执行后表的真实状态。</class> 253/6230 · 623 Needs editing
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	English Returns:;; `true` if an insert took place. Concurrency:;; Blocking on rehashing of `*this`. Notes:;; The `template<class K, class M>` only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回值：;; 若执行插入操作则返回 `true`。 并发特性：;; 阻塞对 `*this` 的重哈希操作。 注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员类型别名时，`template<class k,="" class="" m="">` 才参与重载决议。库假定 `Hash` 可同时接受 `K` 类型与 `Key` 类型作为参数，且 `Pred` 是透明的。这支持异构查找，从而避免实例化 `Key` 类型对象带来的性能开销。</class> 263/4580 · 458 Needs editing
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	English Postconditions:;; `size() == 0`, `max_load() >= max_load_factor() * bucket_count()` Concurrency:;; Blocking on `*this`.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 后置条件：容器大小 `size() == 0`，且 `max_load() &gt;= max_load_factor() * bucket_count()` 并发：会阻塞当前对象 `*this`。 99/1190 · 119 Needs editing
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	English Throws:;; Nothing unless `key_equal` or `hasher` throw on swapping. Concurrency:;; Blocking on `*this` and `other`.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 异常：;; 除非 `key_equal` 或 `hasher` 在交换时抛出异常，否则不抛出任何异常。 并发：;; 阻塞 `*this` 和 `other`。 79/1150 · 115 Needs editing
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	English Requires:;; `n` shall be in the range `[0, bucket_count())`. Returns:;; A constant local iterator pointing the first element in the bucket with index `n`.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 要求：`n` 必须在 `[0, bucket_count())` 范围内。 返回：指向索引为 `n` 的桶中第一个元素的常量局部迭代器。 70/1540 · 154 Needs editing
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	English Returns:;; A statistical description of the insertion and lookup operations performed by the container so far. Notes:;; Only available if xref:reference/stats.adoc#stats[statistics calculation] is xref:unordered_node_set_boost_unordered_enable_stats[enabled].
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回：容器迄今为止所执行插入和查找操作的统计描述。 注意：仅在 xref:reference/stats.adoc#stats[统计计算] 通过 xref:unordered_node_set_boost_unordered_enable_stats[`BOOST_UNORDERED_ENABLE_STATS`] 启用时才可用。 167/2590 · 259 Needs editing
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	English Returns:;; A reference to `x.second` where `x` is the (unique) element whose key is equivalent to `k`. Throws:;; An exception object of type `std::out_of_range` if no such element is present. Notes:;; The `template<class K>` overloads only participate in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回：对 `x.second` 的引用，其中 `x` 是键与 `k` 等价的（唯一）元素。 抛出：如果不存在这样的元素，则抛出 `std::out_of_range` 类型的异常对象。 注意：`template<class k="">` 重载仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时参与重载决议。库假定 `Hash` 可同时使用 `K` 和 `Key` 调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型对象的开销。</class> 285/5580 · 558 Needs editing
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	English Returns:;; The number of elements erased (0 or 1). Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回值：;; 删除的元素数量（0 或 1）。 抛出异常：;; 仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出。 注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员类型别名时，`template<class k="">` 重载版本才参与重载决议。库假定 `Hash` 可同时接受 `K` 类型与 `Key` 类型作为参数，且 `Pred` 是透明的。这支持异构查找，从而避免实例化 `Key` 类型对象带来的性能开销。</class> 266/4960 · 496 Needs editing
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	English Returns:;; The number of elements inserted. Concurrency:;; Blocking on `*this` and `source`.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回值：插入的元素数量。 并发：会阻塞当前对象 `*this` 和源对象 `source`。 46/920 · 92 Needs editing
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	English Returns:;; A `node_type` object holding the extracted element, or empty if no element was extracted. Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal`. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回值：;; 存储提取元素的 `node_type` 对象，若未提取任何元素则为空。 异常：;; 仅当 `hasher` 或 `key_equal` 抛出异常时才会抛出异常。 注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时，`template<class k="">` 重载才参与重载决议。标准库假定 `Hash` 可同时接收 `K` 与 `Key` 类型参数调用，且 `Pred` 是透明的。该机制支持异构查找，避免了实例化 `Key` 类型对象的开销。</class> 280/5460 · 546 Needs editing
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	English Requires:;; `n` shall be in the range `[0, bucket_count())`. Returns:;; A constant local iterator pointing the 'one past the end' element in the bucket with index `n`.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 要求：`n` 必须在 `[0, bucket_count())` 范围内。 返回：指向索引为 `n` 的桶中“尾后”元素的常量局部迭代器。 71/1670 · 167 Needs editing
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	English Effects:;; Sets to zero the internal statistics kept by the container. Notes:;; Only available if xref:reference/stats.adoc#stats[statistics calculation] is xref:unordered_node_set_boost_unordered_enable_stats[enabled].
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 效果：将容器内部维护的统计信息归零。 注意：仅在 xref:reference/stats.adoc#stats[统计计算] 通过 xref:unordered_node_set_boost_unordered_enable_stats[`BOOST_UNORDERED_ENABLE_STATS`] 启用时才可用。 160/2190 · 219 Needs editing
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	English Returns:;; The number of elements erased (0 or 1). Throws:;; Only throws an exception if it is thrown by `hasher`, `key_equal` or `f`. Notes:;; `f` is passed a non-const reference to `x`. + + The `template<class K, class F>` overload only participates in overload resolution if `std::is_execution_policy_v<std::remove_cvref_t<ExecutionPolicy>>` is `false`. + + The `template<class K, class F>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回值：;; 删除的元素数量（0 或 1）。 抛出异常：;; 仅当 `hasher`、`key_equal` 或 `f` 抛出异常时才会抛出。 注意：;; `f` 接收指向 `x` 的非常量引用。 `template<class k,="" class="" f="">` 重载版本仅在 `std::is_execution_policy_v<std::remove_cvref_t<executionpolicy>&gt;` 为 `false` 时参与重载决议。 `template<class k,="" class="" f="">` 重载版本仅在 `Hash::is_transparent` 和 `Pred::is_transparent` 为有效成员类型别名时参与重载决议。库假定 `Hash` 可同时接受 `K` 类型与 `Key` 类型作为参数，且 `Pred` 是透明的。这支持异构查找，从而避免实例化 `Key` 类型对象带来的性能开销。</class></std::remove_cvref_t<executionpolicy></class> 483/7270 · 727 Needs editing
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	English - It has an `InputIterator` template parameter and a type that does not qualify as an input iterator is deduced for that parameter. - It has an `Allocator` template parameter and a type that does not qualify as an allocator is deduced for that parameter. - It has a `Hash` template parameter and an integral type or a type that qualifies as an allocator is deduced for that parameter. - It has a `Pred` template parameter and a type that qualifies as an allocator is deduced for that parameter.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — - 它具有一个 `InputIterator` 模板参数，并且为该参数推导出的类型不符合输入迭代器的要求。 - 它具有一个 `Allocator` 模板参数，并且为该参数推导出的类型不符合分配器的要求。 - 它具有一个 `Hash` 模板参数，并且为该参数推导出的类型是整数类型或符合分配器的要求。 - 它具有一个 `Pred` 模板参数，并且为该参数推导出的类型符合分配器的要求。 191/4940 · 494 Needs editing
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	English Returns:;; A `node_type` object holding the extracted element, or empty if no element was extracted. Throws:;; Only throws an exception if it is thrown by `hasher` or `key_equal` or `f`. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回值：;; 存储被提取元素的 `node_type` 对象，若未提取任何元素则为空。 异常：;; 仅当 `hasher`、`key_equal` 或 `f` 抛出异常时才会抛出异常。 注意：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 为合法成员类型别名时，`template<class k="">` 重载才参与重载决议。标准库假定 `Hash` 可同时接收 `K` 与 `Key` 类型参数调用，且 `Pred` 是透明的。该机制支持异构查找，避免了实例化 `Key` 类型对象的开销。</class> 285/5530 · 553 Needs editing
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	English Returns:;; An iterator pointing to an element with key equivalent to `k`, or `b.end()` if no such element exists. Notes:;; The templated overloads containing `CompatibleKey`, `CompatibleHash` and `CompatiblePredicate` are non-standard extensions which allow you to use a compatible hash function and equality predicate for a key of a different type in order to avoid an expensive type cast. In general, its use is not encouraged and instead the `K` member function templates should be used. + + The `template<class K>` overloads only participate in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回：;; 指向键与 `k` 等价之元素的迭代器；若无此元素，则返回 `b.end()`。 备注：;; 包含 `CompatibleKey`、`CompatibleHash` 和 `CompatiblePredicate` 的模板重载属于非标准扩展，允许使用兼容的哈希函数和相等谓词来处理不同类型的键，从而避免昂贵的类型转换。通常不建议使用它们，而应使用 `K` 成员函数模板。 此外，仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时，`template<class k="">` 重载才会参与重载决议。库假定 `Hash` 可同时以 `K` 和 `Key` 类型调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型的开销。</class> 380/8520 · 852 Needs editing
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	English Returns:;; The number of elements erased. Throws:;; Only throws an exception if it is thrown by `f`.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回值：;; 删除的元素总数。 抛出异常：;; 仅当 `f` 抛出异常时才会抛出。 41/1000 · 100 Needs editing
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	English Returns:;; The number of elements with key equivalent to `k`. Notes:;; The `template<class K>` overload only participates in overload resolution if `Hash::is_transparent` and `Pred::is_transparent` are valid member typedefs. The library assumes that `Hash` is callable with both `K` and `Key` and that `Pred` is transparent. This enables heterogeneous lookup which avoids the cost of instantiating an instance of the `Key` type.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 返回：;; 键与 `k` 等价的元素个数。 备注：;; 仅当 `Hash::is_transparent` 和 `Pred::is_transparent` 是有效的成员 typedef 时，`template<class k="">` 重载才会参与重载决议。库假定 `Hash` 可同时以 `K` 和 `Key` 类型调用，且 `Pred` 是透明的。这支持了异构查找，从而避免了实例化 `Key` 类型的开销。</class> 215/4280 · 428 Needs editing
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	English Postconditions:;; `size() == 0`, `max_load() >= max_load_factor() * bucket_count()` Concurrency:;; Blocking on `*this`.
	Chinese (Simplified Han script) ↹ ↵ NBS … 「 」 『 』 ﹙-﹚ ‐ – — 后置条件：;; `size() == 0`，`max_load() &gt;= max_load_factor() * bucket_count()` 并发：;; 阻塞 `*this`。 93/1190 · 119 Needs editing