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美国科学60秒 SSS 2013-05-31

时间：2013-07-24 01:12:44

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（单词翻译）

　　Baleen1 allows the non-toothed whales to strain sea water for the fish and crustacean2 pray. Alexander Werth of Hampden Sydney College of Virgina avoided a Jonah like journey, and still managed to analyze3 how baleen works. Two kinds of whales sport baleen. Baleanid whales such as the Bowhead, have long springy plates of the delicate fringe. They filter water continuous. Groove-throated whales such as Humpbacks have dense4 beleen, that looks like folded accordion5. They gulp6 water to feed. For tests, Werth submerged racks of Humpback and Bowhead baleen in a flow tank. Plastic beads7 represented food. As water streamed by, filaments8 from neighboring beleen plates naturally twined together and trap the beads. The Bowhead's long fringe, formed the more effective filter, perfect for catching9 tiny krill. But the humpback baleen still nabs plenty. The study is in the journal of Experimental Biology. If you are going to be a massive carnivore without teeth, evolution has to be specially10 creative.


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1 baleen ZPey2     
n.鲸须
参考例句：
  • Other baleen whales have splash guards too,but not like this.一些须鲸物种头顶也有护住喷水孔的构造，但并不长成这样。
  • Baleen whales often appear in this region. Be careful!这一带经常有须鲸出没，要注意安全啊。
2 crustacean Mnrzu     
n.甲壳动物；adj.甲壳纲的
参考例句：
  • Seafood is a valuable lobster crustacean section.名贵海珍品龙虾属甲壳科。
  • The illustrious Cuvier did not perceive that a barnacle was a crustacean.大名鼎鼎的居维叶也未看出藤壶是一种甲壳动物。
3 analyze RwUzm     
vt.分析，解析 (=analyse)
参考例句：
  • We should analyze the cause and effect of this event.我们应该分析这场事变的因果。
  • The teacher tried to analyze the cause of our failure.老师设法分析我们失败的原因。
4 dense aONzX     
a.密集的，稠密的，浓密的；密度大的
参考例句：
  • The general ambushed his troops in the dense woods. 将军把部队埋伏在浓密的树林里。
  • The path was completely covered by the dense foliage. 小路被树叶厚厚地盖了一层。
5 accordion rf1y7     
n.手风琴；adj.可折叠的
参考例句：
  • The accordion music in the film isn't very beautiful.这部影片中的手风琴音乐不是很好。
  • The accordion music reminds me of my boyhood.这手风琴的乐声让我回忆起了我的少年时代。
6 gulp yQ0z6     
vt.吞咽，大口地吸（气）；vi.哽住；n.吞咽
参考例句：
  • She took down the tablets in one gulp.她把那些药片一口吞了下去。
  • Don't gulp your food,chew it before you swallow it.吃东西不要狼吞虎咽，要嚼碎了再咽下去。
7 beads 894701f6859a9d5c3c045fd6f355dbf5     
n.（空心）小珠子( bead的名词复数 )；水珠；珠子项链
参考例句：
  • a necklace of wooden beads 一条木珠项链
  • Beads of perspiration stood out on his forehead. 他的前额上挂着汗珠。
8 filaments 82be78199276cbe86e0e8b6c084015b6     
n.（电灯泡的）灯丝( filament的名词复数 )；丝极；细丝；丝状物
参考例句：
  • Instead, sarcomere shortening occurs when the thin filaments'slide\" by the thick filaments. 此外，肌节的缩短发生于细肌丝沿粗肌丝“滑行”之际。 来自辞典例句
  • Wetting-force data on filaments of any diameter and shape can easily obtained. 各种直径和形状的长丝的润湿力数据是易于测量的。 来自辞典例句
9 catching cwVztY     
adj.易传染的，有魅力的，迷人的，接住
参考例句：
  • There are those who think eczema is catching.有人就是认为湿疹会传染。
  • Enthusiasm is very catching.热情非常富有感染力。
10 specially Hviwq     
adv.特定地；特殊地；明确地
参考例句：
  • They are specially packaged so that they stack easily.它们经过特别包装以便于堆放。
  • The machine was designed specially for demolishing old buildings.这种机器是专为拆毁旧楼房而设计的。

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