莱维的本职是一名化学家，但是这个书名用的是暗喻手法。 有的时候，这种修辞格与这本书的表达意图有些牵强附会。
Levi was a working chemist, but the title is a metaphor and even this figure of speech is sometimes a little strained to comply with the book's scheme.
暗喻是将两种有共同点的不同事物进行隐晦比较的修辞手法。
A metaphor is a trope or figure of speech in which an implied comparison is made between two unlike things that actually have something in common.
避免使用那些你常在书刊报纸上见到的暗喻，明喻或其他比喻手法。
Never use a metaphor, simile, or other figure of speech which you are used to seeing in print.
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