keep up是什麼意思

The company agreed to keep up high levels of output in order to compensate for supplies lost

這家公司同意保持高產量以彌補供貨丟失帶來的缺口。

I still keep up my acquaintance with him.

我仍然和他保持朋友關係。

I can't keep up with all the changes.

我並非所有的`變化都能跟得上。

It pays to keep up to date with your work.

工作能跟上時代是有利的。

It is difficult to keep up with the rapid pace of change.

跟上迅速的變化是很困難的。

Slow down ─ I can't keep up!

慢點——我跟不上了!

When she lost all her money, she was determined to keep up appearances.

她把錢全虧光時,決意佯裝若無其事。