nail /neil/ I.n.［c］1. 钉子；指甲：cut nails 剪指甲；paint one’s nails red涂红指甲 ‖II.vt. 钉，钉牢：nail a lid on a box 给箱子上钉一个盖子；nail up a window 把窗户钉牢 2. 用于短语动词 nail down（就细节）决策，敲定协议；（使）同意细节或决策：After a five-hour meeting, we finally nailed down a deal.经过五个小时会晤我们终于敲定了这笔交易的细节。They nailed him down to a specific time and place.他们使他同意了一个特定时间和地点。