单词：coiled polymer
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This is Scientific American's 60-Second Science. Im Cynthia Graber. This will just take a minute. Buildings consume about a third of the energy and two-thirds of the electricity in the U.S. Roofs are a good place to try to cut those figures. Because
Scientific American(三)月
Long ago, in a small village lived Vishnudutta, a poor Brahmin farmer. He worked hard but was not able to earn much. His son, Somadutta was always asking for more money. Be satisfied with what you have, my son, Vishnudutta would say. One day, Vishnud
英汉幽默故事选读
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Solar cells convert sunlight to electricity. But they don't take advantage of all that solar heat, thereby missing out on the majority of the solar ene
Scientific American(四)月
But we must leave the pin, for it is the pin itself that holds the parts together. 但是必须把大头针留下，因为两块东西就是让大头针来固定的。 Pins are made of many sizes, and are either black or white in colour. They are pre
英国学生科学读本
Have you ever wondered how heating an egg white turns that uncooked clear goo into an opaque gel? Well, that transparent goo is made of mostly water and proteins. Each protein is a long strand of amino acids that you can think of as a string of green
英语时差8，16
The Denatured Egg White 煮鸡蛋还有那么多学问哪?在煮鸡蛋过程，鸡蛋会发生哪些变化呢? 蛋白质变性（protein denaturation）是指蛋白质在某些物理和化学因素作用下其特定的空间构象被改变，从而导致
英语听力文摘 English Digest