The others continued to sit about in silence, brooding.

别的人依然静静地坐着不动, 若有所思.

A child of your age shouldn't sit about blubbering over a lost toy.

像你这么大（岁数）的小孩，不应该因为丢了玩具，就坐在地上哭哭啼啼。

This hot weather takes it out of me; all I want to do is to sit about doing nothing.

炎热的天气让我感觉浑身无力，我只想坐着什么也不干。