美国科学60秒 SSS 2013-05-31
时间：2018-12-24 作者：英语课 分类：Scientific American(五)月
Baleen 1 allows the non-toothed whales to strain sea water for the fish and crustacean 2 pray. Alexander Werth of Hampden Sydney College of Virgina avoided a Jonah like journey, and still managed to analyze 3 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 dense 4 beleen, that looks like folded accordion 5. They gulp 6 water to feed. For tests, Werth submerged racks of Humpback and Bowhead baleen in a flow tank. Plastic beads 7 represented food. As water streamed by, filaments 8 from neighboring beleen plates naturally twined together and trap the beads. The Bowhead's long fringe, formed the more effective filter, perfect for catching 9 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 specially 10 creative.
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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
