| 单词 | synthetic substance |
| 释义 | synthetic substance Then comes the cake - an apotheosis of synthetic substances bought from a local supermarket - all bright colours and tasting like cotton wool. Times, Sunday Times Steroids produced naturally in the body have a heavier carbon content than synthetic substances but, until now, it has been difficult to measure the different carbon ratios. Times, Sunday Times This class of compounds includes several synthetic substances that are important feedstocks for the chemical industry, such as ethylene diamine, 1,3-diaminopropane, and hexamethylenediamine. Retrieved from Wikipedia CC BY-SA 3.0 The raw materials for many of these synthetic substances come from crude oil. Retrieved from Wikipedia CC BY-SA 3.0 Pigments may be any number of natural or synthetic substances with color, such as sulphur for yellow or cobalt for blue. Retrieved from Wikipedia CC BY-SA 3.0 |
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