bag 普通用词，指一般的口袋，有时也指手提包。
sack 应用较窄，指较大的袋子，如麻袋等。
handbag 指手提包，尤指女人用的手提包。
purse 指钱包或小钱袋，在美国相当于bandbag。
参考例句
1. The boss gave her the sack. 老板给了她一个麻袋。
2. Each sack had seven cats. 每个袋里有七只猫。
3. He tumbled his clothes and book into a big sack. 他把他的衣服和书胡乱装进一只大口袋。
英英解释
n.
1. a bag made of paper or plastic for holding customer's purchases
2. an enclosed space
3. the quantity contained in a sack
4. any of various light dry strong white wine from Spain and Canary Islands (including sherry)
5. a woman's full loose hiplength jacket
6. a hanging bed of canvas or rope netting (usually suspended between two trees); swings easily
7. a loose-fitting dress hanging straight from the shoulders without a waist
8. the plundering of a place by an army or mob; usually involves destruction and slaughter
9. the termination of someone's employment (leaving them free to depart) v.
1. plunder (a town) after capture
2. terminate the employment of
3. make as a net profit
4. put in a sack
