记住，只有当您在文法中使用位置时才会定义类型。

Remember that the type is defined only if you use a location in the grammar!

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这里的区别是，在使用位置增加代码让我有了灵活性。

The difference here is that by adding the code at the point of use, I gain flexibility.

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通过使用位置识别，您就可以了解您的合作伙伴所在城市的气象信息。

Using location awareness, you can find weather information for the city in which your partner lives.

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