trade upvi.买更高价的东西；以旧换新traden.贸易；交易；行业；同行；顾客；营业额；交易量v.做生意；从事贸易；购物；营业；(在证券交易所)交易；交换trade extension class职业讲习班trade-biased growth偏重于贸易的经济增长trade mark privileges商标权trade acceptance bill商业承兑汇票Trade Security Policy贸易安全政策tradeoff optimization权衡优化Trade mark protection商标保护trade creation effect增加贸易作用Trade adhering extent贸易依存度Trades Union Congressn.英国工会联盟