Jack of all trades and master of none. 什么都会，样样不精。

Jack of all trades is of no trade. 万事皆通，一无所长。

Jest with an ass and he will flap you in the face with his tail. 你跟驴子开玩笑，将被驴尾打耳光。

Joy and sorrow are next-door neighbours. 是喜是忧难以分。

Joy often comes after sorrow, like morning after night. 暮去必将朝至，苦尽常会甜来。

Joy put heart into a man. 人逢喜事精神爽。

Joy shared with others are more enjoyed. 与人同乐，其乐无穷。四级及格分数

Jadge not a book by its cover. 人不可貌相。

Judge not according to the appearance. 不要以貌取人。

Judge not of men and things at first sight. 审人论事宜谨慎，一见之下莫断定。

Justice has long arms. 天网恢恢，疏而不漏。