名词
中文翻译：黑玉
同义词：
['black gemstone', 'black jade']
例句：
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1.The black opal in the necklace is truly stunning.
项链上的黑玉非常漂亮。
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2. She wore a black opal ring on her left hand.
她左手戴着一个黑玉戒指。
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3. The black opal was said to have been discovered in Brazil.
据说这颗黑玉是在巴西发现的。