1. 利用：trade off 交替换位 | trade on 利用 | trade out 出卖

2. 利用...以图私利：2765trade in以旧物(折价)换取新物 | 2766trade on利用...以图私利 | 2767trademarkn. 商标

1. (为达到利己目的)利用
    If someone trades on something, they make use of it for their own advantage, often in an unfair way.

    e.g. He was a man who traded on the achievements of others.
           他是个不惜利用他人成就作踏脚石的人。