我们的教室非常干净整洁，因为它每天都被打扫。
Our classroom is very clean and tidy because it is cleaned every day.
作为一个类库来说，这是一个设计得干净整洁的API的极佳例子，它既非常符合自身的设计意图，又使得一个可能非常艰险的任务变得易于处置。
As libraries go, this is an extremely good example of a cleanly designed API that is very fit for its purpose and makes a potentially tricky task very easy to handle.
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