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This is Scientific Americans' 60-Second Science. I'm Chelsea Wald. Got a minute? Vinaigrette dressing: when you shake it little vinegar droplets scatter through the oil, but when you put it down, the droplets merge and the dressing separates. That's
Scientific American(二)月
Dallas Attacks West Nile Virus by Land, Air The aerial and ground fumigation programs are blanketing around 1,400 square kilometers of the county, but don't target all mosquitoes. Laura McGowan, who works with Clarke, the company contracted to carry
VOA标准英语2012年(八月)
Ben Carter Powdered material called dry water, could provide a new way to store carbon dioxide in an effort to fight global warming. Dry water looks a lot like fine white sand, which isn't surprising since what makes it dry is that each tiny water dr
VOA标准英语2010年(九)月
Fact: liquid water is heavier than air. Fact: clouds, which consist of water droplets and ice crystals, seem to hover in the air. One final fact: the water droplets in a typical cloud together weigh many tons. Which raises a question: how do clouds s
英语时差8，16
一次咳嗽会产生2万个病毒 The next time you cough or sneeze, there is good reason to cover your mouth. As many as 20,000 viruses are expelled in an average cough, which may be sufficient to infect many people - particularly those who are not
实用英语
What's more, I've detected those falling and rising currents that make up the ocean's true breathing. 此外，我又注意过那些由上而下和由下而上的水流，形成真正的海洋呼吸作用。 I've seen a molecule of salt water heat up
《海底两万里》中英双语有声读物