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(chǎn)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(guān)系。

　　I can't keep up with all the changes.

　　我并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。