| 1. | Ethylene is a growth hormone in plants .
乙烯是植物中一种生长荷尔蒙。
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| 2. | Plasma-polymerization of ethylene gives films of complex, uncertain structure .
乙烯的等离子聚合得到复杂的，无固定结构的薄膜。
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| 3. | Jaffe found that when rubbed plants give off increased amounts of ethylene .
贾菲发现，当搓揉植株时，植物放出的乙烯数量就增加。
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| 4. | Incomplete combustion and improper draft conditions can cause ethylene formation .
不完全的燃烧和不适当的通风条件能导致乙炔的产生。
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| 5. | Ethylene and trans-dichloroethylene are both inactive in the infra-red in this region .
乙烯和反式二氯乙烯在红外光谱的这个区域都无活性。
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| 6. | Ethylene and trans-dichloroethylene are both inactive in the infrared in this region .
乙烯和反式二氯乙烯在红外光谱的这个区域不出现吸收峰。
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| 7. | Even so, the mode of action of the ethylene so produced is still difficult to specify .
即使是如此，这样产生的乙烯的作用方式仍是难以详细说明的。
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| 8. | In contact with a hot surface, naphtha petroleum fractions crack to produce ethylene and propylene .
石脑油馏份与一个热表面接角，就裂解而得到乙烯和丙烯。
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| 9. | Whenever a plant responds to applied, i. e., unbalanced, applications of auxin, ethylene is produced .
当一植物对不平衡地施用生长素起反应时，总是产生乙烯。
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| 10. | It seemed that in methane there was twice as much hydrogen to 1 part of carbon as there was in ethylene .
看来甲烷中含有的氢是乙烯中的两倍，而碳的含量都是1份。
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