packsack英美网络 背包英英释义nouna bag carried by a strap on your back or shoulderSynonym:backpackback packknapsackrucksackhaversack双语例句Then I put my cloths, shoes and my dream in my packsack, and set out.然后,我将衣服、鞋和梦想一起塞进背包中,背上行囊,准备出发。