diamond planets
钻石行星
以上为机器翻译结果，长、整句建议使用 人工翻译 。
youdao
Science fiction has dreamed of diamond planets for many years.
多年来，科幻小说总幻像著钻石行星的存在。
Belonging to a class of worlds known as diamond planets, 55 Cancri e is thought to be rich in the element carbon, which can exist in a variety of structural forms such as graphite (the material used as pencil lead), graphene, or diamond.
BBC: Oddballs: The strange worlds beyond our Solar System
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