1、back up

支持，證實（某種說法）

Radio signals received from the galaxy's centre back up the black hole theory.

從該星系中心收到的無線電信號證實了黑洞理論。

Her views are backed up by a 1989 Home Office report on crime.

1989年內政部的一份犯罪報告印證了她的觀點。

備份（文件）

Make a point of backing up your files at regular intervals.

一定要定期備份文件。

I get so annoyed when I lose work because I've forgotten to back it up.

當我因為忘了備份把完成的工作弄丟時，真是懊惱極了。

將…付諸實施

The Secretary General says the declaration must now be backed up by concrete and effective actions.

秘書長說現在必須將宣言付諸具體有效的行動。

It is time the Government backed up its advert campaigns with tougher measures.

是政府采取更嚴厲的措施來兌現其宣傳承諾的時候了。

（車輛）堵塞，排成長龍

Traffic into London on the M11 was backed up for several miles.

進入倫敦的車輛在11號高速公路上堵了好幾英里。

2、come on

(表示鼓勵)來吧

Come on Doreen, let's dance.

來吧，多琳，我們跳舞吧。

得了吧;算了吧

'Have you said all this to the police?' — 'Aw, come on!'

“你是不是把這些都告訴警方了？”“呀，怎么會呢！”

Come on, Sue, that was two years ago.

得了吧，休，那是兩年前。

進展;進步

Lee is coming on very well now and it's a matter of deciding how to fit him into the team.

李現在進步很大，問題是如何在隊里給他找一個合適的位置。

The knee's coming on fine, I'm walking comfortably already.

膝蓋恢復得很好，我現在走路已經不疼了。

(機器或系統)開始工作，開始運轉

The central heating was coming on and the ancient wooden boards creaked.

中央供暖系統開始工作，弄得那些老掉牙的木板嘎吱作響。