毛坯钻石
Rough diamond
以上为机器翻译结果，长、整句建议使用 人工翻译 。
四是世界上20个最大的毛坯钻石已挖出的矿井三项本世纪。
Four of the world's 20 largest rough diamonds have been dug from the mine three this century.
youdao
在塞维利亚，他是一个备受崇敬的英雄，他们费了很大的劲儿来打磨手中的这块难得的毛坯钻石。
He was a cult hero in Seville, where they had worked enormously hard to nurture a particularly rough diamond.
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