【英语时差8,16】聪明伶俐；聪明机智
时间：2018-12-03 作者：英语课 分类：英语时差8，16
英语课
If you have ever sat on a tack 1 by mistake, you'll know that tacks 2 are very sharp. Used correctly, they are quite useful for posting notices on bulletin boards, for example.
However, if touched incorrectly, their sharpness can hurt you.
When we say that a person is "as sharp as a tack," we are admiring their wit and perception. That person, we are saying, is not only intelligent, but is able to make clever comments about most things in an insightful way. If such a clever person becomes arrogant 3 or sarcastic 4, however, their words can hurt you.
However, if touched incorrectly, their sharpness can hurt you.
When we say that a person is "as sharp as a tack," we are admiring their wit and perception. That person, we are saying, is not only intelligent, but is able to make clever comments about most things in an insightful way. If such a clever person becomes arrogant 3 or sarcastic 4, however, their words can hurt you.
1 tack
n.大头钉；假缝，粗缝
- He is hammering a tack into the wall to hang a picture.他正往墙上钉一枚平头钉用来挂画。
- We are going to tack the map on the wall.我们打算把这张地图钉在墙上。
2 tacks
大头钉( tack的名词复数 )； 平头钉； 航向； 方法
- Never mind the side issues, let's get down to brass tacks and thrash out a basic agreement. 别管枝节问题，让我们讨论问题的实质，以求得基本一致。
- Get down to the brass tacks,and quit talking round the subject. 谈实质问题吧，别兜圈子了。