名词
中文翻译：背包
同义词：
['backpack', 'rucksack', "backpacker's bag", 'travel bag']
例句：
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1. I packed my rucksack with all my essentials for the trip.
我打包了我的背包，里面装满了我出行所需的所有必需品。
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2. The young backpacker was carrying his rucksack on his shoulder.
那个年轻的背包客正扛着他的背包在肩上。
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3. She carried her rucksack to school every morning.
她每天早上都背着她的背包去学校。