business 指包括售货、购货、换货在内的综合商业活动，方式可以是批发或零售。
commerce 多指大规模的买卖或易货关系。
trade 普通用词，含义广。既可指某种具体的商业又可指广泛的贸易。
bargain 多指买卖双方通过谈判、协商就商品质量、数量、价格等项达成协议所成的生意。
deal 口语用词，指买卖双方经过交涉达成协议成交。
参考例句
1. Committee of Energy and Commerce. 能源及商业委员会。
2. This is the Faculty of Commerce and Accountancy building. 这是法政大学的商业与会计学系大楼。
3. The Electronic Commerce Institute invites area businesses to actively participate in promoting E-Commerce education and experience. 电子商务研究所邀请区企业积极参与在促进电子商务的教育和经验。
英英解释
n.
1. transactions (sales and purchases) having the objective of supplying commodities (goods and services
2. the United States federal department that promotes and administers domestic and foreign trade (inclu
3. social exchange, especially of opinions, attitudes, etc.
