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| 11. | Modern scientific discoveries lead to the conclusion that energy may be created from matter and that matter, in turn, may be created from energy. |
| 近代科学家的发现得出这样的结论：物质可以产生能，能又可以产生物质。 |
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| 12. | Antitoxin is substance that acts against a poisonous substance and prevents it from having a harmful effect. |
| 抗毒素是抵抗有毒物质并防止其产生有害作用的物质。 |
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| 13. | In the case of physical change,no new substance is formed. |
| 就物理变化来说，没有新的物质产生 。 |
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| 14. | In all these cases, the electricity is caused by the rubbing of one thing against another. |
| 上述情况，电都是由一种物质与另一种物质摩擦而产生的。 |
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| 15. | 1800年伏特做出了一个实验电池并第一次产生了稳定的直流电。 |
| In1800 Volta made his experiment cell and produced for the first time a steady electric current. |
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| 16. | a substance used by the human body to produce Vitamin A. |
| 一种人体用来产生维他命A的物质。 |
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| -- 来源 -- 英语听读练30’（高一） - Passage 9 Purple Carrots |
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| 17. | He has no other means of acting on matter than by moving it. |
| 人除了移动物质外，无法再对物质产生其他作用。 |
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| 18. | Wherever a chemical change takes place, there is a new substance formed. |
| 化学变化无论发生何处，都会产生新物质。 |
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| 19. | A substance that can combine with a nerve receptor to produce a reaction typical for that substance. |
| 兴奋剂能和神经末梢结合在一起对该物质产生作用的物质 |
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| 20. | A chemical change always results in forming at least on new substance . |
| 一种化学变化总是产生至少一种新物质。 |
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