石油并不是由沉积物中的有机物转化而来的理论已经引起人们的关注，并在许多细节问题上得以证实。

Theories that petroleum is not formed by the transformation of organic matter in sediments have already been noted and are examined in more detail.

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Expo是由拉丁语转化而来的法语词exposition的缩写，意为“公开陈列某物”。

Expo is an abbreviation of exposition, which from Latin through French has a meaning of “putting something out in the open.”

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名祖词主要是由专有名词(人名、地名、商标名称)转化而来的词汇，这些转化后的词汇可以是名词、形容词、副词和动词。

Eponym is such a kind of vocabulary that is transformed from the proper noun (personal name, place name and trade name). These transformed words can be eponymous nouns, adjectives, adverbs and verbs.

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That can be supplied by an antagonist called Aldopa - which is not exactly the same as dopamine, it's slightly different.

这种物质能够由一种拮抗剂,叫做阿多巴转化而来,但它与多巴胺的结构并不完全相同,有一点差别

耶鲁公开课 - 生物医学工程探索课程节选

In fact, people do consume foods with cholesterol, but most of the cholesterol in the body is synthesized from foods that don't have cholesterol itself but have fat that the body turns into cholesterol.

实际上,尽管人们食用含胆固醇的食物,但人体内大多的胆固醇都是由,本身不含胆固醇的食物的脂肪,转化合成而来的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选