Jack of all trades, master of none.

中文 样样皆通，样样稀松

Joy surfeited turns to sorrow.

中文 乐极生悲

Judge not a book by its cover.

中文 评价一本书，不能凭封面

Judge not from appearance.

中文 人不可貌相

Judge not of men and things at first sight.

中文 初次印象，难得真相

Justice has long arms.

中文 天网恢恢，疏而不漏