They were careful to keep their distance from the ill-tempered professor.

他们都谨慎地避开这位坏脾气的教授。

His bad temper is easily accountable; he has had a toothache all day.

他的坏脾气是易理解的, 因他整日牙痛。

We have to bear with his bad temper because he is a bit frustrated these days.

我们他的坏脾气因为这些日子他有点灰心丧气。