相关例句
be incumbent on
1."It is particularly incumbent on those who never change their opinion, to be secure of judging properly at first."
2.The farther we advance in this perception, and the more the uncivilised countries come into contact with the civilised ones by the progress made in the means of transport, so much more will the civilised countries comprehend that the civilisation of barbarous nations, of those distracted by internal anarchy, or which are oppressed by bad government, is a task which offers to all equal advantages -- a duty incumbent on them all alike, but one which can only be accomplished by unity.
