nail down
phrasal verbnail something down
- to fasten something in place with a nail or nails
（用钉子）将…钉牢，将…固定 - to reach an agreement or a decision, usually after a lot of discussion
达成一致；作出决定 - All the parties seem anxious to nail down a ceasefire.
各方似乎都渴望将停火之事敲定。
- All the parties seem anxious to nail down a ceasefire.
nail somebody down (to something)
- to force somebody to give you a definite promise or tell you exactly what they intend to do
迫使明确保证（或准确说出想做之事） - She says she'll come, but I can't nail her down to a specific time.
她说要来，但我无法让她敲定具体什么时候来。
- She says she'll come, but I can't nail her down to a specific time.