They load all their equipment into backpacks.他们把设备全装进背包里面。The keys are in the backpacks.钥匙在背包里.Bags and Luggage - Leather, Leather Goods and Accessories Leather Goods: - Belts, Handbags, Backpacks.采购产品袋子和行李 - 皮革, 皮具货物和配件...

backpacks的音标：...

n.（指登山者、步行者使用或背小孩时使用的）背包， （有轻金属框的）箱形背包( backpack的名词复数 )...