It is incumbent upon us to do so.
这样做是我们义不责任。
It is incumbent upon us to do so.
这样做是我们义不责任。
It is incumbent on me to reclaim him.
劝他改过是我义不义务。
It's incumbent on you to advise your son before he leaves home.
在你儿子离家前他忠告是你义不。
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