如果其对立组件或窗口处于一个不同的上下文，这些方法中每一个都会返回空。

Each of these methods will return null if its opposite component or window is in a different context.

youdao

与苹果的应用商店类似，亚马逊的应用商店也没有任何形式的清晰的退款过程或窗口。

The Amazon Appstore, like Apple's App store, does not have any sort of clear refund process or return window.

youdao

偶尔，我们在正门一出现，有人会企图通过后门或窗口逃跑，当然，都落入了警察的手里。

Now and then, at our entrance, someonetried to escape from back door or window and ran, of course, into the clutch ofpolicemen.

youdao