He's decided to grow a beard.

他已经决定蓄胡须。

He has decided to grow a beard and a moustache.

他已经决定留起络腮胡子和髭。

My father likes to grow a beard.

我爸爸喜欢留胡子。

Do you know who suggested that he grow a beard?

你可知是谁建议林肯留的胡子？

Four-year-old, ah, why I did not grow a beard then Java?

四岁了啊，为什么我还没长出胡子渣呢？