“The airplane crews need to be rested, or we'll never get them out of here.”
機組必須先休息好,否則我們永遠也送不走這些人。
用 need 加 or 的後果句說明現實約束:不是不想快,而是快不了。
They need to be rested, or we'll never get them out.
說明某個現實條件繞不過去時能用,語氣正式務實;日常閒聊別用。
Crews can't fly tired, no way around it. / Rest first, or nobody leaves.
正式
need to be rested 連讀,out of here 放慢收。
The concrete needs time to cure, or the whole build fails. 混凝土得養護夠時間,否則整棟樓都會出問題。
