There is also nicotine, which is powerful poison, and black tar.

里面还有很强的毒素尼古丁和黑焦油。

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There is also nicotine, which is powerful poison, and black tar.

原文第三段提到了尼古丁是有毒的。 。

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This paper gave an example of anatomy and study of unknown compound in black tar.

本文列举了黑色焦油中未知物的剖析研究实例。

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This paper gave an example of anatomy and study of unknown compound in black tar.

本文列举了黑色焦油中未知物的剖析研究实例。

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