所以您必须面带微笑，因为你知道微笑能让人忘记一切不开心的事。

So you must prefer smiling, because you know smiling will let people forget everything unhappy.

youdao

所以您必须面带微笑，因为你知道微笑能让人忘记一切不开心的事。

So you must prefer smiling, because you know smiling will let people forget everything unhappy.

youdao