Similarly, if you want to use find, you need only to ensure that the arguments you pass to it are models of Input Iterator.
同样的，如果你想使用find，你只需要确保这些参数可以通过Input Iterator模型。
These requirements are sufficiently important that we give them a name: we call such a set of type requirements a concept, and we call this particular concept Input Iterator.
这些条件足够重要以至于我们给它取个名字：我们称这些需求为概念，也为这个特殊的概念为InputInterator。
You need to extend this class and provide implementation for the methods Iterator getChoices(String input); to return the probable user list based on the input (Listing 17).
需要扩展此类并为方法IteratorgetChoices(Stringinput); 提供实现，以便基于输入返回这个可能的用户列表（清单17）。
Forward iterators can be used anywhere an input or output iterator is required.
无论是需要输入迭代器还是输出迭代器，均可以使用向前迭代器。
There are five iterator categories: input, output, forward, bidirectional, and random access.
标准库定义了五种迭代器类别：输入、输出、前向、双向和随机访问迭代器。
Bidirectional iterators can be used anywhere that a constant input or constant output iterator is required.
无论是需要常量输入迭代器还是常量输出迭代器，均可以使用双向迭代器。
Bidirectional iterators can be used anywhere that an input or output iterator is required.
无论是需要输入迭代器还是输出迭代器，均可以使用双向迭代器。
Constant reverse bidirectional iterators can be used anywhere that a constant reverse input or constant reverse output iterator is required.
无论是需要常量反向输入迭代器还是常量反向输出迭代器，均可以使用常量反向双向迭代器。
Reverse bidirectional iterators can be used anywhere that a reverse input or reverse output iterator is required.
无论是需要反向输入迭代器还是反向输出迭代器，均可以使用反向双向迭代器。
Bidirectional iterators can be used anywhere an input or output iterator is required.
无论是需要输入迭代器还是输出迭代器，均可以使用双向迭代器。
Bidirectional iterators can be used anywhere an input or output iterator is required.
无论是需要输入迭代器还是输出迭代器，均可以使用双向迭代器。
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