unlike xref:#concurrent_flat_map_emplace[emplace], which simply forwards all arguments to ``value_type``'s constructor.
unlike这与 xref:#concurrent_flat_map_emplace[emplace], which simply forwards all arguments to ``value_type``'s constructor.不同，后者仅将所有参数转发给value_type的构造函数。
admin
unlike这与 xref:#concurrent_flat_map_emplace [emplace], which simply forwards all arguments to ``value_type``'s constructor.不同，后者仅将所有参数转发给value_type的构造函数。