VOA慢速英语:Dictionary.com's New Words to the Wise

短语讲解：

1.It describes a situation that seems difficult or frustrating -- such as trying to learn 300 new words all at one time!

at one time 一度， 从前
例句：At one time 400 men, women and children lived in the village.
曾经有400个男人、女人和孩子居住在村子里。

2.And comedians, people who tell jokes, also would sometimes drop the mic at the end of a performance.

at the end of 在…结尾，在…末端
例句：He parted with us at the end of the trip.
旅行结束时他和我们分手了。

3.It might be hurtful to someone, or at least hurt their image!

at least 至少
例句：He's been away for at least a week.
他走了总有一个星期吧。