Closures are powerful because they enable inner functions to retain access to an outer function's variables even after the outer function has returned.

闭包功能非常强大，原因是它们使内部函数在外部函数返回时也仍然可以保留对此外部函数的变量的访问。

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Later, after the outer function has returned, when the inner function is called, the outer function's local variables will still be available to it.

这样的话，当外部函数返回之后，在调用内部函数时，外部函数的局部变量仍然是可用的。

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In addition, the deployment and use of weapons in outer space would seriously threaten the security of outer space assets and bring harm to the Earth's biosphere.

此外，部署和使用外空武器，将严重威胁外空资产的安全，对地球生物圈也会造成危害。

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