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A backpack is a Viking helmet - neither should be a crowed train.背包像维京海盗的头盔一样,不应该带上拥挤的火车.He squirmed out of the straps of his backpack.他扭动身体，挣开背包的肩带。Looking back, she feels she should never have hung up her backpack.回首过去...
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backpack的音标：backpack的英式发音音标为：['bækpæk]backpack的美式发音音标为：['bækˌpæk]...
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Looking back, she feels she should never have hung up her backpack.回首过去，她觉得自己真不该放下背包不再徒步旅行。He squirmed out of the straps of his backpack.他扭动身体，挣开背包的肩带。This suitcase, and a backpack.这个手提箱和背包....