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【英语时差8,16】为什么禁止近亲结婚?(上)

时间:2015-11-30 08:01来源:互联网 提供网友:yajing   字体: [ ]
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    (单词翻译:双击或拖选)

It’s a distressing1 fact that human activities are causing the wide-scale extinction2 of other species on earth. Something you may not know, however, is that the fewer animals there are in a given species, the more at risk that species is — and not just because it’s easier for a small group to disappear than a large group. Another danger is inbreeding. Inbreeding is the term used when animals mate with their relatives. All animals, including humans, inherit half their genes3 from their mothers and half from their fathers. Within certain limits, it’s good for offspring to have a father whose genetic4 makeup5 is significantly different from its mother’s. It’s kind of like poker6. Reshuffling the deck makes it more likely you’ll draw a good hand by chance. If the deck were only sixteen cards, each of which appeared twice, the chances of getting a good hand would be much lower.


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1 distressing cuTz30     
a.使人痛苦的
参考例句:
  • All who saw the distressing scene revolted against it. 所有看到这种悲惨景象的人都对此感到难过。
  • It is distressing to see food being wasted like this. 这样浪费粮食令人痛心。
2 extinction sPwzP     
n.熄灭,消亡,消灭,灭绝,绝种
参考例句:
  • The plant is now in danger of extinction.这种植物现在有绝种的危险。
  • The island's way of life is doomed to extinction.这个岛上的生活方式注定要消失。
3 genes 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
4 genetic PgIxp     
adj.遗传的,遗传学的
参考例句:
  • It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
5 makeup 4AXxO     
n.组织;性格;化装品
参考例句:
  • Those who failed the exam take a makeup exam.这次考试不及格的人必须参加补考。
  • Do you think her beauty could makeup for her stupidity?你认为她的美丽能弥补她的愚蠢吗?
6 poker ilozCG     
n.扑克;vt.烙制
参考例句:
  • He was cleared out in the poker game.他打扑克牌,把钱都输光了。
  • I'm old enough to play poker and do something with it.我打扑克是老手了,可以玩些花样。
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