名词中文翻译
中文翻译：背包
同义词：
['schoolbag', 'knapsack', 'rucksack']
例句：
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1.I need to buy a new backpack for my son's school trip.
我需要为儿子的学校旅行买一个新的背包。
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2. She carried her books in a backpack while hiking through the forest.
她在徒步穿越森林时用背包携带她的书。
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3. The backpack was too heavy for him to carry on his back.
这个背包对他来说太重了，背不动。