| 释义 |
nail down- 用钉子钉住：
The police broke up the window nailed down and rescued the boy from the fire. 警察打碎了用钉子钉死的窗子，救出了大火中的男孩。 - 使明确表态；确切说明(或解释)：
All of his answers didn't nail me down. 他根本就没对我的提问做出明确回答。 The police at last nailed down the traffic accident. 最后，警方就那次交通事故做出了确切的说明。 - 使遵守诺言；使履行责任(或保证等)：
I mentioned him to nail down his promise. 我提醒他，叫他遵守自己的诺言。
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