不费吹灰之力

　　A lift of the finger.

　　There's nothing to it.

　　Can do it on one's head.

　　As easy as pie.

　　eg：For John, a lift of the finger will do to finish the job.

　　同义词：易如反掌 As easy as winking.

　　反义词：九牛二虎之力 Move heaven and earth to.