Ethylene is highly inflammable gas. When inhaled in great deal, it can have a benumbing effect on human beings.乙烯很容易燃烧，大量吸入时可对人类有麻痺作用。The ministry sees no reason to make EVA notifiable.部里认为没有什么理由将乙烯聚酯乳胶列为需申报物品。If the mixture proves difficult to ignite, increase the proportion of ethylene.如果发现这混合物难以点燃，那就增加乙烯的比例。Ethene and propene are alkenes.乙烯和丙烯都是烯烃。