| 单词 | nail down |
| 释义 | nail down[phrasal verb] 1 nail (something) down or nail down (something) : to make (something, such as a victory) certain to happen确保（胜利等）
2 : to find out or identify (something) exactly查明，敲定（某事物）
3 : to make (something) definite or final确定
⇒ Main Entry: 2 nail |
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