be up to
胜任, 从事于

例句

To be used up.
用光，消耗完

To be up to the sample
与样品相符合，可视同

To be stirred up; rise.
激起；升起

It seems to be clearing up.
天似乎在转晴。

To be or become rolled up.
卷起，折拢

sth. be up to sb.
某事是某人的责任
e.g. He should not drive the boy out, it's not up to him.
他不应该把男孩赶出去 ，那不是他的职责。