贝尔教授关于食品消费的研究主要集中在我们如何从食物中了解自己，他明确地表示：“‘自然’并非天然的，而是文化的。

Dr Bell, whose work on food consumption concentrates on how we use food to work out who we are, makes this very clear: "'Nature' isn't natural.

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色素添加剂划分成两大类：从自然资源中(如植物，矿物，动物)获得的天然色素和不能在自然界中找到的人造色素。

Colour additives belong to one of two groups: pigments derived from natural sources such as vegetables, minerals or animals and those not found in nature and must be man-made.

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城市里有2个博物馆：一个是关于地质，石油和天然气，人与自然的国家博物馆。

There are 2 museums in the city: the museum of Geology, Oil and Gas and the State museum of Human and Nature.

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So, a natural product is something that is made by nature, and often natural products, whether it comes from a plant or a marine organism have some really good, useful properties. And so, one particular compound has anti-tumor properties. So, again, along this line of cancer research.

天然产物是在自然界中生成的,通常一个天然产物，不管是来自植物或者海洋生物,都有些非常好非常实用的性质，其中的一个特殊的化合物,可以治疗癌症,再一次我们又来到癌症研究上。

麻省理工公开课 - 化学原理课程节选