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。

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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Input Interator。

youdao

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 Iterator getChoices(String input); 提供实现，以便基于输入返回这个可能的用户列表（清单 17）。

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