Exemption from legal prosecution, often granted a witness in exchange for self-incriminating testimony. 豁免法律訴訟豁免，通常給予目擊證人以換取可能歸罪于其自身的證詞
I gave Mary an apple in exchange for my favorite banana. 我送給瑪麗一個蘋果換我最喜歡吃的香蕉。
John saved10 cent savings stamps until he had enough to exchange for a$25bond. 約翰儲蓄10分錢的儲蓄券，一直到他有足夠的錢才換成25元的公債券。
An opening in chess in which a minor piece, or pieces, usually a pawn, is offered in exchange for a favorable position. 第一著棋，起手著法國際象棋開局時自愿讓出一個或幾個小棋子(通常為兵)以交換較有利的形勢
