You must be competent to do the job.

　　你得有足夠的能力來做這項工作。

　　Only this kind of talents can be competent for the task of public relation.

　　這種人才能勝任公關任務。

　　Most adults do not feel competent to deal with a medical emergency involving a child.

　　大部分成年人不懂得如何對兒童實施急救。

　　He was a loyal, distinguished and very competent civil servant.

　　他是一位敬業、優秀而且非常稱職的公務員。