| 词组 | nail down |
| 释义 | nail downv. phr.informal To make certain; make sure; settle. 〖非正式〗弄清；确定；决定。◆ Joe had a hard time selling his car, but he finally nailed the sale down when he got his friend Sam to give him $300.乔的车很难卖出，但最后他还是以300美元的价格把车卖给了他的朋友萨姆。 |
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