名词
中文翻译：水袋
同义词：
['hydration pack', 'water bottle', 'water bladder']
例句：
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1. We need tocarry a water pack with us when we go hiking.
当我们去远足时，我们需要带一个水袋。
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2. The soldier carried his water pack on his back during the battle.
在战斗中，这位士兵背着他的水袋。
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3.The hikers used their water packs to stay hydrated during the long trek.
长途徒步旅行者使用他们的水囊来保持水分。