英译中：

1. Why doesn't she learn that she has already worn out her welcome?

2. Your cousins have worn out their welcome.

3. By the time Buzz left, he had worn out his welcome with almost everyone.

中译英：

1. Tom的频繁来往是史密斯一家人厌烦了。

2. 大约在午夜时分，我觉得我呆得够久了，所以我回家了。