| 短语 | nail something down |
| 释义 | nail something down 1. fasten something securely with nails 钉牢, 钉住。 2. identify something precisely 弄清, 确定： something seems unexpected - I can't nail it down, but it makes me uneasy. 好像出了点事——我弄不清楚是什么, 可它让我感到不安。 3. secure something, especially an agreement 敲定; 确保（某事物, 尤指协议）。 |
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