1、knock off

使減少；使降低

Udinese have knocked 10% off admission prices.

烏迪內斯隊將入場費降低了10%。

He has knocked 10 seconds off the world record.

他將世界紀錄縮短了10秒。

下班；收工

If I get this report finished I'll knock off early.

如果我寫完這篇報告，我就會早點下班。

What time do you knock off?

你什么時間下班？

殺死

He had many motives for wanting to knock off Yvonne.

他有很多殺伊馮娜的動機。

People don't just knock one another off like this unless there's big money at stake.

如果不是為了冒險賺大錢，人們不會像這樣彼此殘殺。

2、come back

回憶起;回想起來

He was also an MP — I'll think of his name in a moment when it comes back to me.

他當時也是一位國會議員，他的名字我得想一下才能記起來。

When I thought about it, it all came back.

當我回想起來，往事全都涌上了心頭。

重新流行;再度時興

I'm glad hats are coming back.

我很高興又開始流行戴帽子了。