名词中文翻译
中文翻译：背包
同义词：
['rucksack', 'satchel']
例句：
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1. He packed his bags and left for the airport early in the morning.
他早上很早就打包好行李，准备去机场。
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2. The backpack was filled with books and school supplies.
这个背包里装满了书和学习用品。
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3. She carried her knapsack on her back as she walked through the park.
她背着她的背包在公园里散步。