a bag made out of cloth that is like a tube in shape and is closed by a string around the top. It is usually carried over the shoulder. 筒状帆布包（或旅行包） - (North American English) (British English holdall)
a large bag made of strong cloth or soft leather, used when you are travelling for carrying clothes, etc. （用帆布或软皮制造的）大旅行袋 
Word Originearly 20th cent. (originally US): from duffel ‘sporting or camping equipment’, originally denoting a bag for equipment.