1.in the habit of 有...的习惯

例句：He' s not in the habit of drinking a lot.
他不习惯於多喝酒.

2.thirst for 渴望；渴求

例句：He has a strong thirst for knowledge.
他有很强的求知欲。

3.time to time 时不时地；经常

例句：From time to time there were sudden explosions of a southeast wind.
不时有阵阵猛烈的东南风突然刮来。

4.plausible excuse 可信的借口；合理的托辞
例句：He cast about in his mind for some plausible excuse for not turning up at the meeting.
他心里在盘算，想找一个什么说得过去的理由来解释他为什么没有到会。