She poured some vodka into a glass and knocked it back in two swallows.她往玻璃杯里倒了一些伏特加酒, 两口就喝完了。

It seemed as though every time we got rolling something came along to knock us back.每次我们准备干些什么时, 好像都会出点儿状况拖我们后腿。

That really knocked back any hope for peace.那的确使进一步的和平谈判成为了泡影。

You can't possibly knock back an offer like that!你根本无法拒绝那样的提议！

I know absolutely nothing about why I was knocked back.我一点也不明白为什么被拒绝。

The things you asked knocked me back a bit but I suppose I should have expected as much.你问的事情让我有点儿吃惊, 但也许我本应该预料到的。