backpack knapsack背包
The Backpack背包;开普度背包客旅社;双肩包
solar backpack太阳能背包;太阳能双肩背包;叉车蓄电池;UPS电池
laptop backpack电脑背包;笔记本电脑背包
Mountain Backpack专业登山包
Bike Backpack自行车背包
Her backpack她的双肩背包;她的双肩包
Argon Backpack极限探险包
Backpack Oz奥兹背包客旅馆
N-COUNT(可数名词) A backpack is a bag with straps that go over your shoulders, so that you can carry things on your back when you are walking or climbing. 双肩包