nail down

动词 nail down:

1. succeed in obtaining a position
   同义词：nail, peg
2. define clearly
   同义词：pin down, peg down, narrow down, narrow, specify
3. make final; put the last touches on; put into final form
   同义词：finalize, finalise, settle

1. He had a hard time selling his car, but he finally nailed down the sale when he got his friend John to give him$500.
   他原先卖不掉他的汽车，但他的朋友约翰给了他500美元，终于把这宗买卖定了下来。
2. He told us that he had lost the money but we nailed down that he had lied by proving he had spent it.
   他对我们说他丢了钱，但是我们证实是他把钱花了，从而确定他是说谎。
3. It take the negotiator ten hours to nail down a deal.
   参加协商的人花了十个小时才敲定一桩生意。