commerce 多指大規(guī)模的買賣或易貨關(guān)系。
trade 普通用詞，含義廣。既可指某種具體的商業(yè)又可指廣泛的貿(mào)易。
bargain 多指買賣雙方通過談判、協(xié)商就商品質(zhì)量、數(shù)量、價(jià)格等項(xiàng)達(dá)成協(xié)議所成的生意。
deal 口語用詞，指買賣雙方經(jīng)過交涉達(dá)成協(xié)議成交。
bargain的例句：
1. They prefer to bargain with individual clients, for cash.
在現(xiàn)款方面，他們更愿意同散戶打交道。
2. They need hostages in order to bargain with the government.
他們要想同政府討價(jià)還價(jià)就得有人質(zhì)。
3. Fresh salmon is a bargain at the supermarket this week.
這周超市的新鮮鮭魚特價(jià)銷售。
4. Clothes are the best bargain, with many items marked down.
買衣服是最劃算的，許多衣服都降價(jià)了。
5. Majorca and Ibiza are tops for holiday bargain-hunters in June.
對于實(shí)惠型度假者來說，馬略卡島與伊維薩島是6月份的絕好選擇。
6. "It's a fabulous deal, a real bargain."
“這樁買賣真讓人難以置信，絕對合算。”
7. At this price the wine is a bargain.
這種葡萄酒賣這個(gè)價(jià)真是很便宜。
8. More and more criminals will agree to plea-bargain.
越來越多的罪犯會(huì)同意接受認(rèn)罪辯訴協(xié)議。
9. The so-called bargain was just a big con!
這種所謂的減價(jià)商品只不過是個(gè)大騙局!
10. The bargain prices are expected to entice customers away from other stores.
低廉的價(jià)格意在把顧客從其他商店吸引過來。
11. You can drive a hard bargain in the free market.
在自由市場上你可使勁地討價(jià)還價(jià)。
12. The women in the market often bargain away for hours.
女人們經(jīng)常在市場里一連幾小時(shí)討價(jià)還價(jià)。
13. Don't bargain on getting any support from her; she's very selfish.
別指望從她那里得到什么援助, 她很自私。
14. We do not like to bargain with you about the prices.
我們不想就價(jià)格問題與你討價(jià)還價(jià)。
15. This shirt was a bargain — only ￡15 in a sale.
這件襯衫是便宜貨,大減價(jià)時(shí)只賣十五英鎊。