This black substance is carbon.

这种黑色物质是碳.

辞典例句

They were covered with feathers and a sticky black substance called tar.

他们的身上粘满了羽毛,还涂着一层粘粘的叫做沥青的黑色物质.

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Graphite is a soft black substance.

石墨是一种软而黑的物质.

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Coal underwent great changes before it became the bright, brittle, black substance which we now use.

煤经历了巨大的变化才变成亮 、 脆而黑的物质供我们使用.

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A horrible black substance that looked and smelled about as appetizing as a burnt tennis shoe.

令人恐怖的黑乎乎的一团,看起来,闻起来都像一只烧焦了的网球鞋.

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