A2 as much as, or more than, a number or amount至少
It will cost at least $100.那个东西至少要花100美元。
It will be £200 at the very least.那东西最少也要200镑。
You'll have to wait at least an hour.你至少要等一个小时。
B2 used to reduce the effect of a statement反正,不管怎样
I've met the president - at least, he shook my hand once.我见到总统了——不管怎样他和我握了一下手。
B1 used to emphasize that something is good in a bad situation至少,还好,不管怎么说
It's a small house but at least there's a garden.那是一座小房子,但不管怎么说还有一个花园呢。
B1 used to say that someone should do something small, even if they do nothing else至少,起码
Even if she didn't want to send a present, she could at least have sent a card.即使不想送礼物,她起码也应该寄一张贺卡。