[] to buy and sell things做生意；做买卖；从事贸易◆companies that trade in agricultural products做农产品贸易的公司◆The euro has made it easier for European countries to trade with each other.欧元有助于欧洲国家间的贸易。 [] to exist and operate as a business or company营业；营运◆The firm has now ceased trading.这家公司现在已停业。◆Rodine Limited now trades as Harvest Software.罗丁有限公司现在以“丰收软件公司”之名经营。 () [] to be bought and sold, or to buy and sell sth, on the stock exchange（证券）交易，买卖◆Shares were trading at half their usual value.股票正以半价进行交易。 [] to exchange sth that you have for sth that sb else has互相交换；以物易物◆He earns a lot of money but I wouldn't trade places with him.他挣钱很多，但我不想和他换位置。●ˈtrade at sth () to buy goods or shop at a particular store在（某商店）购物●ˌtrade ˈdownto spend less money on things than you did before降低消费档次◆The survey showed that consumers are unwilling to trade down to cheaper cosmetics when times are hard.此项调查显示，困难时期消费者也不愿意转而购买较低档的化妆品。●ˌtrade sth ˈin (for sth)to give sth you have used as part of the payment for sth new以旧换新；折价换购◆People can trade in their old PCs for the latest model.人们可以用旧电脑折价换购最新款的电脑。●ˌtrade sth ˈoffto balance two things or situations that are opposed to each other权衡；平衡；使协调◆You sometimes need to trade price off against quality.人们有时需要在价格和质量之间取得平衡。➡trade-off ●ˌtrade ˈupto sell sth in order to buy sth more expensive（卖掉原有的以便）买更贵的东西；卖次买好◆Many drivers are trading up to a four-wheel drive.许多司机准备卖掉旧汽车，再买四轮驱动汽车。to give sth you have used as part of the payment for sth more expensive以旧换新；折价换购