如果任意一个函数参数或者局部变量引用了客户端对象，你就导致了内容泄漏。

If any of those function arguments or local variables refer to a client-side object, you may be creating a memory leak.

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这种语法表示把所有局部变量通过引用传递给lambda函数。

This syntax implies that all local variables will be passed by reference to the lambda function.

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对于源代码的一项更实质性的限制是不能引用在所添加的声明或者块外声明的局部变量。

A more substantial limitation on the source code is that there's no way to refer to local variables declared outside the statement or block being added.

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