文章列表

• 1.【英语时差8,16】为什么一天有24小时？（上）
• The earth turns on its axis every 24 hours or so were taught. But, before we had pictures from space, how would we prove it to someone? The rising and...
• 2.【英语时差8,16】独角鲸（下）
• Researchers from Harvards School of Dental Medicine think the giant tooth might also act as a sensory organ. With an electron microscope they discover...
• 3.【英语时差8,16】独角鲸（上）
• Narwhals arent fish, theyre mammals-a rare type of whale.And a spiraled tusk they famous for isn't a horn.But it is actually an elongated tooth. Only ...
• 4.【英语时差8,16】石油能源已耗尽？（上）
• I keep hearing that were running out of oilis this true? Some geologists say that oil production may have already peaked. But others say there is a lo...
• 5.Tingroom Radio—驯服宠物（中）
• Amazingly, after only ten years of selected breeding, the team had developed a strain of foxes with dog like tameness towards humans: tail wagging, fa...
• 6.Tingroom Radio—驯服宠物（上）
• Have you ever played with a dog or cat and wondered why they are so tame? How did our ancient ancestors take wild, and potentially dangerous, carnivor...
• 7.Tingroom Radio—不锈钢为什么不生锈？（下）
• The best way to avoid rust is to use stainless steel. Like all steel, stainless steel is mostly iron, but it also contains nickel and chromium. These ...
• 8.【英语时差8,16】不锈钢为什么不生锈？（上）
• Our modern world, with its skyscrapers, suspension bridges, and automobiles, relies heavily on steel. If you own an aging car however, you know firsth...
• 9.【英语时差8,16】白兰地是如何做出来的（上）
• Making wine is a biological process. Live yeast added to grape juice digests the juices sugar giving off alcohol as a byproduct. How much alcohol is p...
• 10.【英语时差8,16】舞台灯光的起源（下）
• If youve ever rubbed your eyes and seen faint sparkles of light, you have demonstrated a surprising fact of sensory physiology. Depending on how hard ...