rucksack和bag的区别rucksack和bag具体有什么区别?

rucksack和bag的区别rucksack和bag具体有什么区别? pack和bag的区别 in bag和in the bag的区别 plastic bag 和 polybag 的区别 sports bag 和Athletic bag?sports bag 和Athletic bag 两者有什么区别?怎么网业上的包包会有这样的分类? 用explorer,tent,torch(flashlight),rucksack,sleeping bag,camp造三句话,要包含所有 duffle bag 和duffel bag 的区别请英语高手帮个忙, 爱玛仕Birkin Bag和Kelly Bag又什么区别呢? carry my bag 和with my bag有区别吗? the girl's bag和 girl's bag 还有the women's right 和women's right.其实就是想问有the和无the的区别 英语单词：satchel 和 bag 都有 背包 的意思 其具体区别是什么 bag和packet有何联系和区别? This is your bag.和 Here's your bag.有什么区别? What's in your bag和What's there in your bag区别区分 用法 Have you bought a new bag 和Did you buy a new bag有什么区别 so 和such 的用法?so that 和so ...that有什么区别?such that 和 such...that有什么区别?so.=such.是不是so big a bag =such a big bag? a 和 the的区别Mum,where is my CD player?It's in ___white bag on your desk. cat和bag的音标分别是什么?