He defeated the incumbent governor by a large plurality.

他以压票击败了现任州长。

It is incumbent on me to reclaim him.

劝他改过是我义不容辞的义务。

It is incumbent upon you to warn them.

你有责任警告他们。

It is incumbent upon us to do so.

这样做是我们义不容辞的责任。

It's incumbent on you to advise your son before he leaves home.

在你儿子离家前给他忠告是你义不容辞的事。

Any (not either ) of the three opposition candidates still in the race would make a better president than the incumbent.

正在参加竞的三个反对党中的任何 （不是 either ) 一个都会比现任总统干得更好。