This leads to process fragments that execute several times, often until a certain exit condition is satisfied.

这会导致流程片断多次执行，通常是持续到满足一定的退出条件为止。

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The filter() method first checks to see if the list is empty — the critically important exit condition for this method.

filter() 方法首先检查列表是否为空，这是该方法的重要退出条件。

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At this point, the while condition loops until an exit condition is reached — ideally, when the capture has completed successfully.

此时，while条件循环，直到达到退出条件—理想情况下是捕获成功完成。

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