| 11. | Snow flakes came swirling into the compound yard. |
| 雪花纷飞着飘进院子。
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| 12. | He found the rays thrown off by the compound could penetrate very thick surfaces. |
| 他发现这种化合物发出的射线可以穿透很厚的外层。
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| 13. | Libraries made education possible, and education in its turn added to libraries: the growth of knowledge followed a kind of compound interest law, which was greatly enhanced by the invention of printing. |
| 藏书使教育成为可能，而教育反过来又丰富了藏书，因为知识的增长遵循着一种“滚雪球”的规律。
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| 14. | Moreover, there is still a third compound , red lead, the well-known paint. |
| 此外，还有第三种化合物：红铅，是人们熟悉的颜料。
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| 15. | The chemical reactivity of APO would prevent the parent compound from reaching the discharge water of a treatment plant. |
| 三嗪基膦氧化物的化学反应能力会阻碍废水中原有的化合物到达处理站的排水中。
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| 16. | The actual compound is considered to be a derivative or the parent compound. |
| 把实际化合物看作母体化合物的衍生物。
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| 17. | Air is a mixture of several gases rather than a compound . |
| 空气是几种气体的混合物，而不是一种化合物。
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| 18. | reduce a compound to its constituentelements |
| 将一化合物还原为构成该化合物的元素
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| 19. | a mercurial ointment, compound , etc |
| 含汞药膏, 汞化合物
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| 20. | white chemical compound that is added to foods, usu meat, to make their flavour stronger |
| 谷胺酸钠; 味精
|