New words：

jealous ['dʒeləs] adj.吃醋的；妒忌的；妒羡的；忌妒的
be jealous of 妒忌

Sample Sentences：

He was jealous of Tom's wealth.
He is jealous of his colleague's success.
Children often feel jealous when a new baby arrives.
Should I be jealous? There's nothing to be jealous of.

colleague ['kɔli:g] n. 同事；同行；同僚

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