中英成語俚語800對120：掉以輕心

　　掉以輕心

　　Make it lightly.

　　Make light of.

　　Lower one's guard.

　　eg：It's an important job，you must not take it lightly.

　　中英俚語俗語來源：柳宗元·論師道書：“故吾每為文章，未嘗敢以輕心掉之。”

　　同義詞：毫不在意 To make nothing of.

　　反義詞：嚴(yán)陣以待 Poised for action.