To discover or establish conclusively
明确地决定或建立
nailed down the story by checking all the facts.
通过查核所有的事实而下的结论
To win
赢得
nailed down another victory in the golf tournament.
赢得了另一项高尔夫球大赛
见 tooth
(of a person) very tough; completely callous or unfeeling
（人）强硬的；铁石心肠的，冷酷无情的
an action or event regarded as likely to have a detrimental or destructive effect on a situation, enterprise, or person
催命符，致命一击
this was going to put the final nail in the coffin of his career.
这对他的事业来说会是个致命打击。
(of payment) without delay
（付款）当场的，立即的
elicit a firm promise or commitment from someone
使承诺
I can't nail her down to a specific date.
我无法让她说定一个日子。
fasten something securely with nails
钉牢，钉住
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。
secure something, especially an agreement
敲定；确保（某事物，尤指协议）
fasten a door or window with nails so that it cannot be opened
把（门、窗等）钉死