1、Unless and until there are adequate demonstrations, it is possible this market panic will continue.
除非有足夠充分的證明，否則市場的恐慌仍將繼續(xù)。

2、An acceptance has no effect unless and until it is communicated to the offeror.
一個承諾只有通知到要約人時才發(fā)生效力。

3、I will not believe it unless and until he tells me so.
除非他親口對我說,否則我決不相信。

unless and until翻譯