字神帝國英語天地

今天的主題，壁虎很可愛~~ ><"

 今日主題：Tiny Toe Tools Ensure Gecko Traction
壁虎可以飛簷走壁的秘訣

洪欣老師推薦：托福聽力最好的課外教材：60-Second Science
康康精選托福會考的主題，堅持每天精聽一定會進步的哦!!

建議方法：
1. 先聽兩三遍 (不看文稿)
2. 再一句一句聽寫 (每句都要聽寫數遍，直到寫出85%以上的字)
3. 最後check文稿，看哪聽不出來，單字沒背過，還是發音不熟。
4. 堅持天天聽，就能每天進步哦。

MP3音檔 (按右鍵可下載聽)：喜歡的同學，幫忙推或按讚哦~~
http://online1.tingclass.net/voaspe/…/20140825sa_science.mp3

只有音檔怎夠，聽不懂地方，不用怕，康康幫你準備好中英文稿了：

中英文稿：
As is well known, geckos sell car insurance. But they're also famous for their extremely adhesive feet, which can keep them stuck to walls and even ceilings. Archimedes wondered how they do it. Geckos can also easily loosen their grip and break into a dash, which has flummoxed physicists. But scientific stick-to-itiveness finally found the on/off switch.
眾所周知，壁虎公司是賣汽車保險的，而壁虎也因為其可以飛簷走壁的腳而出名，這使得它們可以黏在牆面甚至天花板上。阿基米德曾經就很好奇它們是如何做到這 一點的。壁虎們可以輕鬆的放開自己的腳，然後突然掉下來，這令很多物理學家感到困惑。但是科學家們堅持不懈的研究終於發現了其中的秘密。

Geckos' toes are covered in thousands of tiny hairs called setae. These setae can bend to make contact with all the grooves and crevices in a surface. To adhere, the setae rely on small electromagnetic attractions between molecules called van der Waals forces. You can find more 60-Second Science on chinavoa.com.
壁虎的腳趾上覆蓋了成千上萬的被稱為剛毛的小細毛。這些剛毛可以彎曲來『抓住』物體表面上所有的溝槽和縫隙。為了能夠粘附在上面，這些剛毛依靠分子間被稱為範德華引力的小的電磁引力。

Researchers created mathematical models that revealed that the default for gecko feet is non-sticky. To activate the grip, the lizards extend and angle their setae to create millions of contact points with a surface. The research is in the Journal of Applied Physics. [Congcong Hu and P. Alex Greaney, Role of seta angle and flexibility in the gecko adhesion mechanism]
研究人員創建數學模型來揭示壁虎的腳趾是非粘性的。為了緊抓住表面，蜥蜴會伸展剛毛和調整剛毛角度，來與物體表面產生數百萬的接觸點。該研究被發表在《應用物理學》雜誌上。

Scientists would love to create synthetic adhesives based on the gecko trick. Perhaps by harnessing the power of setae, robots could climb walls, and stick or unstick without expending much energy, just as the gecko does.
—Clara Moskowitz
根據壁虎這一特技，科學家想要創製一種合成黏著劑。也許通過利用剛毛的力量，機器人可以向壁虎那樣爬牆，不需要耗費太多能量，就可以粘在牆上或與牆分開。—克拉拉‧莫斯科維茨