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所有的宝石权威都同意,钻石、红宝石、蓝宝石和绿宝石是宝石。
All authorities on gems agree that the diamond, ruby, sapphire, and emerald are precious stones.
youdao
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所有的宝石权威都同意,钻石、红宝石、蓝宝石和绿宝石是宝石。
All authorities on gems agree that the diamond, ruby, sapphire, and emerald are precious stones.
youdao