文章列表

• 1.【英语时差8,16】彗星研究者
• Heres a great story of someone using their noggin to figure out something about nature. For a long time people have been fascinated by comets passing ...
• 2.【英语时差8,16】手脚心为何总是出汗？
• The hands and feet contain more sweat glands than any other part of the body. One square inch of skin on the palm of your hand may contain as many as ...
• 3.【英语时差8,16】昆虫也遵循万有引力定律？2
• These grip the surface the same way a rock climber might grip a cliff face with her fingertips. Each of these tarsi also has a tiny, sticky cushion. S...
• 4.【英语时差8,16】昆虫也遵循万有引力定律？
• Its such a common sight, you probably dont think twice. You swat at the fly buzzing around your head, and it seeks refuge on the ceiling. You stomp at...
• 5.【英语时差8,16】玉米大豆种植模式效益更好？2
• These bacteria split the nitrogen atoms apart and combine them with other molecules, making the nitrogen available to the plants that the bacteria are...
• 6.【英语时差8,16】玉米大豆种植模式效益更好？
• For thousands of years, the Maya, in what is now Central America, have planted their fields with alternating rows of corn and beans. Together corn and...
• 7.【英语时差8,16】山楂树如何帮助构建生态平衡2
• To understand why a plant would grow such heavy thorns, we need to look back ten or fifteen thousand years to a time when mastodons, mammoths, ground ...
• 8.【英语时差8,16】山楂树如何帮助构建生态平衡
• Extinct animals are gone for good, but living species can sometimes tell us about the food chains that existed long ago. Hawthorns are members of the ...
• 9.【英语时差8,16】飞鱼真的会飞？
• Do flying fish really fly? Or do the y just kind of jump out of the water? Great question， and the answer is Yes. There are around sixty-four species...
• 10.【英语时差8,16】如何计算光速2
• Then, in 1676, a Danish astronomer named Ole Roemer saw something interesting in the sky. He was watching the moons of Jupiter go around something fai...