Soot was cause for a different concern in another recent study. Scientists with the American space agency, NASA, suggest it as a major cause of global warming. The study says the problem is how soot interacts with snow and ice. Snow and ice have high

发表于:2019-01-22 / 阅读(52) / 评论(0) 分类 英语时差8,16

A study finds that air pollution is worse for the heart than the lungs.The American Heart Association published the findings in its magazine, Circulation. Researchers used information given by more than half-a-million adults. The information is from

发表于:2019-01-22 / 阅读(43) / 评论(0) 分类 英语时差8,16

How Do Breathalyzers Work? If a police officer sees you driving in a reckless manner, chances are youll be pulled over and asked to breathe into a special machine that measures your blood alcohol content. But how can your breath reflect how much alco

发表于:2019-01-22 / 阅读(79) / 评论(0) 分类 英语时差8,16

There are some antiviral drugs that doctors may use to treat influenza. Each year, medical researchers work to develop vaccines to prevent the flu from infecting people. No one knows yet exactly how much protection the vaccine provided people this fl

发表于:2019-01-22 / 阅读(72) / 评论(0) 分类 英语时差8,16

Have a Crush on Tracy: I think I should tell everyone that Li and I have just been reading some celebrity magazines. Weve been reading about the lives and loves of our favourite celebrities. Li: I discovered that Brad Pitt is Tracys favourite celebri

发表于:2019-01-22 / 阅读(52) / 评论(0) 分类 英语时差8,16

Jo: Now Jean, you're looking very pleased with yourself. Jean: Am I? Jo: Yes, is there something you're not telling me? Jean: I got a pay rise. Jo: No wonder you're feeling so chuffed. Congratulations! Jean: Well,what was the word you used to describ

发表于:2019-01-22 / 阅读(63) / 评论(0) 分类 英语时差8,16

Complimenting Brits William:Would we normally sort of say to people, you know, youre a good-looking girl, youre a good-looking guy, youre a pretty girl? Michelle: Erm, I probably wouldnt actually, because I think some people, especially in Britain an

发表于:2019-01-22 / 阅读(49) / 评论(0) 分类 英语时差8,16

As World AIDS Day is marked on Dec. 1, some experts are growing more outspoken in complaining that AIDS is eating up funding at the expense of more pressing health needs. They argue that the world has entered a post-AIDS era in which the disease's sp

发表于:2019-01-22 / 阅读(51) / 评论(0) 分类 英语时差8,16

When you think about inventions that have radically changed human existence, what comes to mind? Probably the wheel, the printing press, maybe the refrigerator and definitely personal computers. Then there are those more mundane things that we rarely

发表于:2019-01-22 / 阅读(81) / 评论(0) 分类 英语时差8,16

The characters in Marjane Satrapi's Persepolis (co-directed with Vincent Paronnaud) are simple, friendly black-and-white line drawings, as uncomplicated as characters in a children's book. Which is precisely what throws you when they get themselves p

发表于:2019-01-22 / 阅读(64) / 评论(0) 分类 英语时差8,16

Time for the mail bag. Let's see what we have. Dear A Moment of Science. Are aliens going to eat us? Signed, Frightened. Well, Frightened, that's more of a science fiction question. But science does have something to say here, and sometimes purely im

发表于:2019-01-22 / 阅读(52) / 评论(0) 分类 英语时差8,16

Technophobia What? Technophobe: Someone who does not like, trust, or want to use technology, especially computers. (Macmillan English Dictionary)Technophobia is not a new term and technophobes have existed since the Industrial Revolution and probably

发表于:2019-01-22 / 阅读(217) / 评论(0) 分类 英语时差8,16

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

发表于:2019-01-22 / 阅读(167) / 评论(0) 分类 英语时差8,16

Surprise at Stonehenge! Wizards and aliens aside, actual scientists don't have much to say about Stonehenge--the ancient ring of rocks in Amesbury, England--that hasn't been said. That is, until now. Just recently a four-thousand-year old gravesite w

发表于:2019-01-22 / 阅读(160) / 评论(0) 分类 英语时差8,16

Dear Annie: I am 17 years old and my brother is two years older. When he started dating Kim, everything was fine, but as I got to know her better, it became clear that she is just using my brother. I asked my mom what I should do, and she said I shou

发表于:2019-01-22 / 阅读(127) / 评论(0) 分类 英语时差8,16

Ya?l: Today, on A Moment of Science, another episode of guilty confessions. That's right. Don is going to confess a secret, and then we'll use science to help him understand it. Don: I confess nothing, Ya?l. My conscience is clear. Y: Then how come I

发表于:2019-01-22 / 阅读(188) / 评论(0) 分类 英语时差8,16

You're driving along on your way to deliver some helium balloons to a birthday party. Suddenly you hit the brakes. As your car rapidly decelerates, you feel yourself pushed up against the wheel. Why? That one's probably not too tough. Although you ma

发表于:2019-01-22 / 阅读(213) / 评论(0) 分类 英语时差8,16

In this Moment of Science Don and Yael discuss how our emotions might change as we age. D: The older my parents get the more boring they become. First of all, they always spend their time with the same group of friends. They rarely go out and meet ne

发表于:2019-01-22 / 阅读(185) / 评论(0) 分类 英语时差8,16

Everybody knows that the Catholic Church has been shaken in the past few years by scandals involving the sexual abuse of children. There may even be a general suspicion among some people that Catholic priests are more likely to abuse children than ot

发表于:2019-01-22 / 阅读(59) / 评论(0) 分类 英语时差8,16

Amanda: Hi, Mike. What's this music you're listening to? I feel like I just walked into a Starbucks. Mike: Please don't insult me like that-this is a far cry from the kind of elevator music they play at your average coffee shop. For your informatio

发表于:2019-01-22 / 阅读(65) / 评论(0) 分类 英语时差8,16