business

詞意辨析：

affair, business, matter, concern, thing

這些名詞均含“事情”之意。
affair: 含義較廣，側重指已發生或必須去做的任何事情或事務。複數形式多指重大或較複雜的事務。
business: 通常指較重要或較難而又必須承擔的事情，也可指商事。
matter: 普通用詞，著重指一件考慮中的或需要處理的事。
concern: 往往強調與個人或團體利害有直接或重大關係的事。
thing: 用作“事情”解時，詞義較籠統、含糊，多用於指不很具體的事。

business, commerce, trade, bargain, deal

這些名詞均含“貿易，交易”之意。
business: 指包括售貨、購貨、換貨在內的綜合商業活動，方式可以是批發或零售。
commerce: 多指大規模的買賣或易貨關係。
trade: 普通用詞，含義廣。既可指某種具體的商業又可指廣泛的貿易。
bargain: 多指買賣雙方通過談判、協商就商品質量、數量、價格等項達成協定所成的生意。
deal: 口語用詞，指買賣雙方經過交涉達成協定成交。

英文解釋：

名詞 business:

1. a commercial or industrial enterprise and the people who constitute it
   同義詞：concern, business concern, business organization, business organisation
2. the activity of providing goods and services involving financial and commercial and industrial aspects
   同義詞：commercial enterprise, business enterprise
3. business concerns collectively
   同義詞：business sector
4. the volume of commercial activity
5. a rightful concern or responsibility
6. the principal activity in your life that you do to earn money
   同義詞：occupation, job, line of work, line
7. an immediate objective
8. incidental activity performed by an actor for dramatic effect
   同義詞：stage business, byplay
9. customers collectively
   同義詞：clientele, patronage

字典網

中英例句：

1. The main business of this meeting is our wages claim.
   這次會議的主要議題是我們在工資方面的要求。
2. Business is always brisk before Christmas.
   聖誕節前生意總是很興隆。
3. I don't understand this business.
   我不了解這件事。
4. It's a teacher's business to make student learn.
   使學生學習是教師的責任。
5. They've done some business together.
   他們一起做過生意。