keep up
英 [kiːp ʌp]   美 [kiːp ʌp]  
（使）继续下去，（使）不停止;坚持，保持;（使）保持良好状态;不落后，并驾齐驱;（使）不下降;（使）浮起;（使）不倒下;（士气等）保持高昂;（使）熬夜;（天气）持续不变;跟上，赶上（其他人或其他事物的变化或进步）;继续假装

例句：

Slow down ─ I can't keep up! 

慢点——我跟不上了！

I can't keep up with all the changes. 

我并非所有的变化都能跟得上。

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

跟上迅速的变化是很困难的。

Things are changing so fast, it's hard to keep up. 

事情变化得太快了，很难跟上形势。

We must keep up with the times. 

我们必须跟上时代前进的步伐。

I keep up to date with the news by listening to radio. 

我通过听收音机了解最新消息。

Love to keep up correspondence with far-flung friends. 

我很喜欢了解朋友们的近况。