1、get down

使沮喪；使憂郁

At times when my work gets me down, I like to fantasize about being a farmer.

有時當工作讓我沮喪時，我喜歡幻想自己是一個農場主。

寫下；記下

The idea has been going around in my head for quite a while and now I am getting it down on paper.

這個想法在我腦海里縈繞許久了，我現在就將它寫在紙上。

俯身；跪下；趴下

She got down on her hands and knees on the floor.

她雙手撐地跪在地上。

'Get down!' she yelled. 'Somebody's shooting!'

“趴下！”她大聲喊道，“有人開槍！”

2、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。