Lets nuke it in the microwave, we often say as we pull a frozen dinner out of the freezer. That figure of speech seems to express the fact that our experience with nuclear power and with microwaves goes back only a few years, while our experience wit

发表于:2019-03-06 / 阅读(245) / 评论(0)

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【英语时差8,16】生病了也可以运动？

D: I guess it make sense. It's just I've heard that regular physical activity can strengthen your immune system and help prevent catching cold and other illnesses. So I figured that even if youre already sick, doing something physical may help. Y: We

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【英语时差8,16】如何界定性别？

When you go to the pet store to pick out a new puppy, one of the first questions you may be asked is whether you want a male or a female. And when your friends have a new baby the first thing you find out is whether its a boy or a girl. We may be fam

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英语时差8，16

【英语时差8,16】抗生素

Antibiotics, as the name implies, work against life, or more specifically against living cells. Since our bodies are also made up of living cells, the antibiotics have to distinguish between the cells in our bodies and the cells of the bacteria causi

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【英语时差8,16】青霉素的历史

Today, a fever is an uncomfortable nuisance, but a hundred-plus years ago, fevers were often fatal. The difference between then and now is the class of drugs known as antibiotics. As the name implies, anti-biotics work against life, or, more specific

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【英语时差8,16】甜菜汁有益大脑（上）

Is there any way to prevent or cure dementia? Unfortunately, no: theres no cure for dementia. And theres no sure fire way to prevent it, either. But scientists suspect that some types of foods may help the brain stay healthy longer. Right.For example

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【英语时差8,16】记忆的奥秘

Do you remember who won the world series in nineteen sixty- eight, but forget where you left your keys? Are you great at remembering all the details of a story, but lousy when it comes to remembering peoples names? What our brains choose to remember,

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【英语时差8,16】大脑与手

A surprising phenomenon sometimes occurs to people who have lost a hand. Soon after the hand is lost, they report that they can feel it again this time when something touches the side of their face. A neurologist can lightly touch different areas on

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【英语时差8,16】看“聪明宝宝"影片有用吗？

The babies who watched the video with a parent didnt do terribly worse, but they definitely didnt learn more. The clear implication is that infants learn best from live interactions with their parents. Other studies have found that smart baby videos

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【英语时差8,16】特德·丹森谈《犯罪现场调查：网络》

Ya?l: How's it going, Don? D: OK, I guess. Y: What's wrong? D: Well, I've been getting headaches lately, and my neck and shoulders are kinda sore. Y: It sounds like you have the classic symptoms of computer vision syndrome. D: Really? I can see why s

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【英语时差8,16】瓶装雨水

Don comes up with another entrepreneurial venture, but Yael straightens him out just in time. [Thunder] Y: What are you doing outside, Don? It's about to rain. D: I'm setting up bottles. Y: I can see that. But why? D: For my new business venture: bot

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英语时差8，16

【英语时差8,16】「狐狸与我」：一段人跟动物的友谊

Dear Annie: I'm a 15-year-old girl, and my friend Kendall has stolen a ring from me. I've known Kendall for a couple of years, and recently we've become best friends. I invited her over to my house and showed her the ring, and she really liked it. Th

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【英语时差8,16】乐观的代价

Mike: I think my cat might be coming down with something. Amanda: Poor thing. She has looked a bit unhappy recently. Do you think she's sick? Mike: I don't know, but it's better to be safe than sorry. Let's take her to the vet; she needs a couple of

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【英语时差8，16】尾巴吱吱叫

Don: [WHISTLING A BIRDSONG-LIKE TUNE] Ya?l: Nice tune Don, but can you whistle with your tail like an Anna's hummingbird? D: Hummingbirds can whistle with their tails? Y: Male Anna's hummingbirds, which live along the west coast of North America, can

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英语时差8，16

【英语时差8，16】大小形状不一的番茄

Ya?l: Hey Don, what's that? Don: It's a tomato I found! Don't you think it looks like Richard Nixon? I wonder why tomatoes and other fruits sometimes grow into such different shapes. Y: Scientists wonder about that too, and they are a step closer to

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英语时差8，16

【英语时差8,16】记忆的奥秘（下）

In two studies, scientists showed volunteers a series of words or images while their brains were being monitored. The volunteers were not told it was a memory experiment, so they made no special effort to memorize the words or scenes. After the exper

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英语时差8，16

【英语时差8，16】萤火虫数量减少，专家忧心忡忡

Preecha Jiabyu used to take tourists on a rowboat to see the banks of the Mae Klong River aglow with thousands of fireflies. These days, all he sees are the fluorescent lights of hotels, restaurants and highway overpasses. The firefly populations hav

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英语时差8，16

【英语时差8，16】天生爱游荡

When you've been to the zoo have you noticed how some of the animals pace around a lot? In this Moment of Science Don and Ya?l discuss one explanation for this behavior. D: Ya?l, I went to the zoo yesterday, and boy, the polar bear just kept pacing i

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【英语时差8，16】老人依旧欣赏幽默？

Ya?l and Don wonder if old folks still appreciate humor. Y: Every time I see the old crone living next door to me I joke around a little, you know, to be friendly, and she just scowls at me. Maybe when people get old their sense of humor is the first

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英语时差8，16

【英语时差8，16】眼见

Don: Say you're looking at an object on a table in front of you. How long do you think your eyeballs stay in one position? Ya?l: You mean, how long before they move? I'm going to guess... a minute. D: More like less than a second. Y: Yow! D: Though w

发表于:2019-03-06 / 阅读(271) / 评论(0)

英语时差8，16