trade /treɪd/ ► SEE ALLtrade down (to sth)trade sth in (for sth)trade sth off (against sth)trade on sthtrade up (to sth)trade upon sth●ˌtrade ˈdown (to sth)1.to spend less money on things than you used to降低消费◆People are trading down and buying cheaper food. 人们都减少开销，购买廉价食品。2.to sell sth large or expensive and buy sth smaller or less expensive卖好买次；卖大买小；卖高价的买低价的◆They traded down to a house with fewer bedrooms. 他们卖掉房子，买了个卧室少些的。OPPtrade up (to sth)[v + adv]●ˌtrade sth ˈin (for sth)to give sth that you have used to sb you are buying sth new from as part of your payment以旧换新；折价贴换◆He traded his motorbike in for a new van. 他把摩托车折价卖掉，添钱买了辆新客货车。[v + n/pron + adv][v + adv + n]▸ˈtrade-in
noun
a method of buying sth by giving a used item as part of the payment for a new one; the used item that you give以旧换新；折价贴换；折价旧物◆the trade-in value of a car 一辆车的折价价值◆Do you have a trade-in? 你有折价贴换的东西吗？●ˌtrade sth ˈoff (against sth)to balance two things or situations that are opposed to each other权衡；平衡；调和◆The government were attempting to trade off inflation against unemployment. 政府力求在通货膨胀和失业之间取得平衡。◆They were willing to trade off information to keep the hostages alive. 为了保住人质性命，他们愿意交出信息。[v + adv + n][v + pron + adv][v + n + adv] (less frequent) ▸ˈtrade-off(between sth and sth)
noun
the act of balancing two things that you need or want but which are opposed to each other（在需要而又对立的两者间的）权衡，平衡，协调◆a trade-off between inflation and unemployment 通货膨胀和失业之间的平衡◆There is a trade-off between the benefits of the drug and the risk of side effects. 药物的疗效和副作用风险之间的矛盾需要调和。●ˈtrade on sth ( ˈtrade upon sthmore formal, less frequent) (disapproving) to unfairly make use of sth for your own advantage利用…（谋私利）◆He traded on his father’s name to get himself a job. 他倚仗父亲的名望为自己谋了份差事。SYNexploit sth[v + prep]●ˌtrade ˈup (to sth)to sell sth small or not expensive in order to buy sth larger or more expensive卖次买好；卖小买大；卖低价的买高价的◆He traded up to a larger car. 他卖掉了汽车，买了辆更大的。OPPtrade down (to sth)[v + adv]●ˈtrade upon sth➡trade on sth