nail down

US /neɪl daʊn/
UK /neɪl daʊn/
"nail down" picture
1.

確定, 敲定, 明確

to succeed in getting a definite decision or agreement about something

:
We need to nail down the exact date for the meeting.
我們需要確定會議的具體日期。
Can you nail down the details of the contract by tomorrow?
你能在明天之前敲定合同的細節嗎?
2.

迫使明確, 迫使做決定

to force someone to be specific or to make a decision

:
The lawyer tried to nail down the witness on the exact time of the incident.
律師試圖迫使證人說出事件發生的準確時間。
It's hard to nail him down on a commitment.
很難讓他做出承諾。