pin down

v.使受约束,阻止,压制

同：	[v.] nail down, narrow, narrow down, pin up

"The foreign exchange market is the world's largest market. The exact size of the market is difficult to pin down,"
外汇市场是世界最大的市场。市场的准确规模很难说清楚收藏
The Boy had to pin down the dog to wash him.
这男孩必须扣牢这只狗帮它洗澡。收藏
He has fobbed us off with too many empty promises, and this time we've got to pin him down to one
他总用空洞的诺言搪塞我们，这回我们非要叫他履行一次诺言。收藏
There's something wrong with this colour scheme but I can't quite pin it down.
这种颜色搭配不太合适,可是我也说不清楚怎麽不合适.收藏
You must pin down every quotation to its author.
你一定要确定每一个引文的作者是谁。收藏

　　　 more...

define clearly
- I cannot narrow down the rules for this game
[同] nail down, narrow, narrow down, peg down, pin down, specify
attach with or as if with a pin
- pin up a picture
[同] pin down, pin up

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