nail down

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

fight tooth and nail

见 tooth

hard as nails

(of a person) very tough; completely callous or unfeeling

（人）强硬的；铁石心肠的，冷酷无情的

nail one's colours to the mast

a nail in the coffin

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。

on the nail (北美亦作

(of payment) without delay

（付款）当场的，立即的

nail someone down

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。

nail something down

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）

nail something up

fasten a door or window with nails so that it cannot be opened

把（门、窗等）钉死