科学60秒:“精灵”相机的珍贵照片
Cameras were once . Today, really good cameras fit in your pocket. And now, researchers at Cornell have developed a camera that’s just a half-millimeter on each side and a hundredth of a millime...
告别寂静的春天
故事Rachel Carson was a scientist and a bird watcher. She noticed, in the late '50s, the gradual disappearance of some birds, and linked it to our use of 1)pesticides. She wrote a book about her ...
生命的拼搏
短文Life Struggle Once upon a time in a land far far away, there was a wonderful old man who loved everything. Animals, spiders, insects... One day while walking through the woods the nice ol...
塑胶中的化学物质 (1)
Hints: Bisphenol A;polycarbonate plastic Bisphenol A is a chemical widely used to make hard, polycarbonate plastic. Food storage containers, reusable water bottles and baby bottles are among the ...