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美国科学60秒 SSS 2013-06-28

时间:2013-07-25 06:36来源:互联网 提供网友:mapleleaf   字体: [ ]
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    (单词翻译:双击或拖选)

   Plants can choose where their seeds end up. Some float on the winds, others on the water. Many seeds hit the ride on or inside animals. And the farther seeds get from their parents and any predators2 of the disease the parent might have, the better chance of survive, or so the theory goes. Researchers study that phenomenon in the South America chili3 pepper () which releys on birds like fly catchers just spread the seed. To get realistic samples, researchers plot chili seeds from the droppings of captive fly catchers, then they scatter4 them near and far from wild chili bushes in Bolivia. Contrary to the prevailing5 theory, distant seeds fared no better than seeds beneath chili plants. But it turns out that the trip through the birds gives the seeds different competitive edge. The passage strips them of the predator1 attracting chemicals and pathogenical fungal which quite (rip) off the seeds survivor6 rate compared to their undigested counterparts. The results appear in the Journal of Ethology letters. So even though these chili seeds don't need to go the distance to survive, you might see that the seeds in the bird is worth about a fur on the bush.


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1 predator 11vza     
n.捕食其它动物的动物;捕食者
参考例句:
  • The final part of this chapter was devoted to a brief summary of predator species.本章最后部分简要总结了食肉动物。
  • Komodo dragon is the largest living lizard and a fearsome predator.科摩多龙是目前存在的最大蜥蜴,它是一种令人恐惧的捕食性动物。
2 predators 48b965855934a5395e409c1112d94f63     
n.食肉动物( predator的名词复数 );奴役他人者(尤指在财务或性关系方面)
参考例句:
  • birds and their earthbound predators 鸟和地面上捕食它们的动物
  • The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》
3 chili JOlzm     
n.辣椒
参考例句:
  • He helped himself to another two small spoonfuls of chili oil.他自己下手又加了两小勺辣椒油。
  • It has chocolate,chili,and other spices.有巧克力粉,辣椒,和其他的调味品。
4 scatter uDwzt     
vt.撒,驱散,散开;散布/播;vi.分散,消散
参考例句:
  • You pile everything up and scatter things around.你把东西乱堆乱放。
  • Small villages scatter at the foot of the mountain.村庄零零落落地散布在山脚下。
5 prevailing E1ozF     
adj.盛行的;占优势的;主要的
参考例句:
  • She wears a fashionable hair style prevailing in the city.她的发型是这个城市流行的款式。
  • This reflects attitudes and values prevailing in society.这反映了社会上盛行的态度和价值观。
6 survivor hrIw8     
n.生存者,残存者,幸存者
参考例句:
  • The sole survivor of the crash was an infant.这次撞车的惟一幸存者是一个婴儿。
  • There was only one survivor of the plane crash.这次飞机失事中只有一名幸存者。
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TAG标签:   美国科学60秒  英语听力  SSS
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