She made us keep going even when we were really up against it.即便我们处境非常艰难, 她仍让我们坚持。

Her temperature went up and down in a most disconcerting way.她的体温时高时低, 让人十分担心。

I strolled up and down before calling a taxi.在叫出租车之前, 我来来回回地踱步。

The decision is up to you.这个决定由你来做。

It was not up to him to put matters right.他不负责摆平事情。

He was up to his waist in mud.泥浆漫到了他腰部。

up to two years' waiting time长达两年的等待时间

It's not up to your usual standard.这没有达到你通常的标准。

She's up to no good.她在搞鬼把戏。

I don't think he's up to the job.我觉得他胜任不了这个工作。