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. A stiff breeze made the sails bag out. 一股劲风吹得船帆鼓了出来。
2. My bag is not black but red. 我的书包不是黑的而是红的。
3. She has a bag. The bag is black. 她有一个书包。这个书包是黑色的。
英英解释
n.
1. a flexible container with a single opening
2. the quantity of game taken in a particular period (usually by one person)
3. place that runner must touch before scoring
4. a container used for carrying money and small personal items or accessories (especially by women)
5. the quantity that a bag will hold
6. a portable rectangular container for carrying clothes
7. an ugly or ill-tempered woman
8. mammary gland of bovids (cows and sheep and goats)
9. an activity that you like or at which you are superior v.
1. capture or kill, as in hunting
2. hang loosely, like an empty bag
3. bulge out; form a bulge outward, or be so full as to appear to bulge
4. take unlawfully
5. put into a bag
