名词
中文翻译：宝石
同义词：
['gem', 'gemstone', 'precious stone例句：1. The diamond is the most valuable gem in the world.（钻石是世界上最珍贵的宝石。）']
例句：
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1. The diamond is the most valuable gem in the world.
钻石是世界上最珍贵的宝石。
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2. She wore a necklace with a gem on it.
她戴着一串项链，上面挂着一颗宝石。
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3. The gemstone was so beautiful that it sparkled like a diamond.
这颗宝石如此美丽，闪烁着像钻石一样的光芒。