I like to be on my own sometimes.

　　有時候我喜歡一個人待著。

　　It is sometimes possible to arrest or reverse the disease.

　　有時可以阻止病情發(fā)展或使病情徹底好轉。

　　Teachers sometimes presuppose a fairly high level of knowledge by the students.

　　教師有時候假定學生的知識水平相當高。

　　Sometimes you feel better for a good weep.

　　有時候你痛痛快快哭上一場就會覺得好受些。

　　Sometimes I go by car.

　　有時我坐車去。