英语听力文摘 English Digest 620、冰块如何使饮品冷却？

How Does Ice Cool Drinks? Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? Heat is a measure of molecular activity: the faster a

英语听力文摘 English Digest 562、寒冷的晒伤！

A Cool Sunburn A listener from Ontario, California wrote to A Moment of Science with a question her sons had asked her. The boys wondered why is it that when you get sunburned you often feel chilled. It really does seem like a contradiction: youve be

英语听力文摘 English Digest 533、为何冰箱会发出声音？

Why refrigerators hum? Why refrigerators hum，on toay's moment of science.On the recent program we have discussed how fluorocarboncoolant cools your food by coming to a boil in coils hidden in your fridge. How is this possible? When you boil water o

英语听力文摘 English Digest 532、有一种沸腾能冷却你的食物！

The Rolling Boil That Cools Your Food When you think of something boiling, you probably picture a pot on the stove, but theres another kitchen appliance that brings liquid to a boil, not to heat food, but cool it. It sounds crazy, but household refri

每日一词【355】heat：高温，压力

今天我们要学的词是heat。 大家都知道heat是高温的意思，那么不难想象，引伸一下，heat也可以理解为压力。还有两个多星期，美国2008年总统大选的初选就要拉开帷幕了。 Democratic leading candid

美语听力 English Cafe 51

Topics: Mount Rushmore, Indian summer, to cut to the chase, to jaywalk, current vs. present, to prove someone wrong Words: mount monument to carve Indian summer dog days (of summer) humidity severe heat wave to harvest harvest moon crops horizon opti

美语听力 English Cafe 81

Topics: Earth Day, Dr. Seuss books, pronouncing sin, sing, hit, heat, and hate; about six oclock versus around six oclock; What I wouldnt give versus What I would give; I couldnt care less versus I could care less Words: to observe activist grassroot

学个词Learn a Word 第355期 heat

今天我们要学的词是heat。 大家都知道heat是高温的意思，那么不难想象，引伸一下，heat也可以理解为压力。还有两个多星期，美国2008年总统大选的初选就要拉开帷幕了。Democratic leading candida

英语听力文摘 English Digest 470、昆虫界的“投弹手”

Bombardier Beetle 投弹手甲虫 Male：Is it a beetle or some sort? Female:Right in deed.It's a bombardier beetle .This one is an African species, but it could be found on most other continents too. M: Bombardier ? He releases bomb or some sort? F:

每日一词【1112】take some heat：受到批评

今天我们要学的词是take some heat。 To take some heat, 受到批评。 The candidate is taking some heat for his stance on illegal immigrants, 候选人因为在非法移民问题上的立场而受到批评。华盛顿红人队教练沙纳汉因

英语听力文摘 English Digest 412、防火气球

The Fireproof Balloon 防火气球 Yael, Want to see a trick ? Sure. Here, blow up this balloon. Ok, now what? Now, I light this candle. Now what do you think will happen when you put the flame under the balloon? Itll pop , of course. The flame will

英语听力文摘 English Digest 414、天生的猎手

Snake Vision Snakes have heat-vision that allows them to catch their dinners in the dark. True or false? True! It isnt quite right to call it vision, thoughmore accurate would be to say that certain specie s , such as rattlers, have pit s just under

英语听力文摘 English Digest 148、像猪一样快乐

D: Congratulations on completing your PhD in Zoology this week, Yael. That makes six advanced degrees for you and eleven for me. Y: Well, we want to make sure Moment of Science listeners know they're getting only the best information. D: You must be

美国习惯用语:315 stand out; stand the heat

我们今天要讲的习惯用语有一个共同的词: stand。我们要学的第一个习惯用语是: stand-out。这儿在stand和out之间有一个连词符号。 Stand-out当名词用。它和形容词outstanding意义相关连。不少人知道

英语听力文摘 English Digest 310、海洋热量

Ocean Heat 海洋热量 Ya?l: I hear a lot about global warming, but how do scientists take the Earths temperature? Don: Great question. Most of the excess heat trapped by greenhouse gasses like carbon dioxide ends up in the oceans.Thats because the

英语听力文摘 English Digest 171、喝酒暖身？不过是错觉

Contrary to popular belief, alcohol does not make you warmer. It may give you the feeling that youre getting warmer, but thats just an illusion: really, alcohol makes you more susceptible to the cold. In cold weather, the body reacts by routing blood

英语听力文摘 English Digest 181、蛇的视力

Snake Vision 即使在晚上，蛇也能凭借它超常的视力抓到食物。究竟为什么，听听就知道了。 Time for True or False.We 'A Moment of Science' gives you a scientific claim that you may have never heard before and then tells yo

英语听力文摘 English Digest 270、单腿站立的鸟

Cold Feet and Hot Wings 鸟通常只在休息或睡觉的时候才单脚站立。鸟类学家认为，他们这么做是为了减少能量的消耗，并把一只脚收到翅膀之下休息，通常他们会交替使用两只脚独立。披着一身羽

英语听力文摘 English Digest 261、热是一种运动？

The Heat Is On 热传递，是热从温度高的物体传到温度低的物体，或者从物体的高温部分传到低温部分的过程。热传递是自然界普遍存在的一种自然现象。只要物体之间或同一物体的不同部分之间

英语听力文摘 English Digest 267、火是什么？

What Is Fire? 火是物质燃烧过程中散发出光和热的现象，是能量释放的一种方式。火焰分为焰心、中焰和外焰，温度由内向外依次增高。燃烧过程必须有可燃物、燃点温度、氧化剂三项并存，缺一