n. 背包，行囊；背负装置
v. 背包旅行；挑运，把……放入背包
[
复数
backpacks
第三人称单数
backpacks
现在分词
backpacking
过去式
backpacked
过去分词
backpacked
]
1.He staggered a little under the weight of his backpack.
他身上的背包压得他有点步履蹒跚。
2.An unattended backpack was found in a rubbish pile.
在垃圾桶里发现了一个无人看管的背包。
3.I lost my backpack.
我的背包丢了。
4.What’s in your backpack?
你的背包里有什么？
5.Remember when lifting a backpack, or anything, to lift using the arms and legs and to bend at the knees.
记住，当提起背包或其他东西时，要用胳膊和腿提起，膝盖弯曲。
6.Our uncle's backpack was half empty.
我们叔叔的背包有一半是空的。
7.He was also carrying a backpack or wearing a backpack.
这个人还带着一个背包，或者说是背着一个背包。
8.This backpack is way too heavy.
这个背包太重了。