1、knock off

使減少；使降低

Udinese have knocked 10% off admission prices.

烏迪內(nèi)斯隊將入場費降低了10%。

He has knocked 10 seconds off the world record.

他將世界紀(jì)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、definite

明確的;確定的

It's too soon to give a definite answer.

要給出一個明確的答復(fù)，現(xiàn)在還為時過早。

Her Royal Highness has definite views about most things.

女王陛下對大多數(shù)事情都有明確的觀點。

(證據(jù)或信息)確鑿的，確切的

We didn't have any definite proof.

我們沒有任何確實的證據(jù)。

If you have any definite news of my husband, please let me know.

如果有我丈夫的確切消息，請一定告訴我。