文章列表

• 1.【英语时差8,16】海獭之病2
• Toxoplasma gondii is a protozoan that is fatal to otters if its ingested. They may be getting in it from the shellfish they eat, or just drink it in s...
• 2.【英语时差8,16】如何保存肉类？
• On the way home from the grocery, you get delayed so much that the frozen meat youve bought thaws out. The question for this Moment of Science is shou...
• 3.【英语时差8,16】海獭之病
• Unfortunately, a lot of sea otters off the coast of California are dying off, and the problem may be Mr Allfor. A four-year study was recently conclud...
• 4.【英语时差8,16】热量动能
• Take two nails and scrape them together vigorously. Now touch the place you were scraping. Its hot! Let them cool and try it again. Its hot again! You...
• 5.【英语时差8,16】癌细胞扩散2
• So basically, in order to move, a cell climbs hand-over-hand along the extracellular matrix until it reaches a blood or lymphatic vessel and penetrate...
• 6.【英语时差8,16】癌细胞扩散
• A major reason why many cancers are so dangerous is that they metastasize. This means that instead of staying in one place, the cancer cells migrate f...
• 7.【英语时差8,16】走路时为什么要摆手？2
• But although it happens passively, arm swinging plays an important role in making your stride more efficient. It does this by counterbalancing your to...
• 8.【英语时差8,16】鼻塞2
• Unfortunately, theres no quick and easy way to dry up a toddlers runny nose. Although anti-histamines may stop the drainage, they can also clog up the...
• 9.【英语时差8,16】走路时为什么要摆手？
• Have you ever wondered why we swing our arms while walking? Its a curious phenomenon, since arms dont play an obvious role in locomotion. You can stil...
• 10.【英语时差8,16】风力发电机2
• Turbines with one or two blades are actually even more efficient. But because theyre also lighter and tend to spin faster, theyre also noisier. These ...