Horizon - Life On Mars 火星生命 - 3

Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out. We know that conditions on Mars today are not very good for life.

新东方背诵文选 L40 Cohesion-tension Theory

Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. U

VOA慢速英语2010年-SCIENCE IN THE NEWS - Severe Ocean Sto

BARBARA KLEIN: This is SCIENCE IN THE NEWS, in VOA Special English. Im Barbara Klein. BOB DOUGHTY: And Im Bob Doughty. Today we remember Hurricane Katrina and tell about the science of severe ocean storms. (MUSIC) BARBARA KLEIN: Many Americans are ob

VOA双语新闻：BP寻求新选择封堵破损油井

Oil company BP is considering a so-called static kill to seal off its damaged Macondo well in the Gulf of Mexico, even as plans go forward to complete a relief well nearby. The plan would have to be approved by U.S. government officials who are worki

英语听力：自然百科 旱灾的成因与影响

旱灾的成因与影响 Its signs are subtle and slow: the earth dries; water levels fall; the rains do not come; and the land is gripped by drought. At its most basic, a drought occurs when more water is used than isreplenished. It is a balance bet

英语听力：探索发现 科学新发现：我们的大气层-18

The air thins and they begin to lose the protective weight of the miles of air above them. The pressure is dropping, when you finally get to the stratosphere, and to the altitude we like to work at, it's only one one hundredth that of it's on the gro

英文短文：Cohesion-tension Theory

Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the ninete

VOA标准英语2010年-BP Studies Static Kill Option on Damag

Capping Stack deploys from on board the Transocean Discoverer Inspiration on the MC 252 location 11 July 2010 Oil company BP is considering a so-called static kill to seal off its damaged Macondo well in the Gulf of Mexico, even as plans go forward t

VOA标准英语2010年-Gulf of Mexico Oil Well Remains Shut A

U.S. officials say a cap on a damaged oil well in the Gulf of Mexico appears to have a small leak, but they say there are no plans to remove the cap from the well. Engineers are carefully studying the well for any evidence of problems. Engineers spot

【英语4级听力】来自同龄人的压力-Peer Pressure

Kelly Moore and her friends went to the beach. Kelly did not know how to swim. All her friends were having fun in the water. Come in! they kept shouting. Stop being a chicken! she heard them say. Kelly hated being teased. She finally decided to jump

英语听书《海底两万里》第43期 第4章 尼德兰(12)

Without my noticing it? 我怎么一点都不觉得？ Without your noticing it. And if you aren't crushed by so much pressure, it's because the air penetrates the interior of your body with equal pressure. 您一点不觉得。您所以不被这样大

英语听书《海底两万里》第41期 第4章 尼德兰(10)

Note well, my fine Canadian, I went on, if such an animal exists, if it lives deep in the ocean, 请您注意，我又说，我的诚实的加拿大人，如果有这样的一种动物，如果它是生活在海洋底下， if it frequents the liquid

双语有声阅读:Water 'found on Mars' 火星上“发现”有

Water 'found on Mars' 火星上发现有水 The brine seepage is believed to be in Candor Chasm 咸水渗出物应该是在Candor Chasm There is currently water on the surface of Mars, Nasa scientists believe. The evidence is contained in pictures ta

英国学生科学读本 第35期:蒸汽往上冒(2)

There would soon be an explosion; the kettle would be burst open. It is in this way that boiler explosions are often caused. When there is too much steam in a boiler, and it cannot get out, it presses against the sides of the boiler, until at last th

科学喝水要知道的4件事

【英文原文】 If I were to stop drinking water right now, how long could I live? There are several different factors involved here. A human being isnt an automobile which needs a certain amount of gas. There are conditions under which a person c

双语有声阅读：内聚压力理论

Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the ninete

【英语时差8，16】水上运动

In 1993, water aerobics was only for senior citizens or patients in rehab. Nowadays, it encompasses a variety of trendy underwater sports, all of which are healthy. The body has 90 percent support when under water. That means the joints only have to

英语听书《海底两万里》第180期 第13章 一些数字(3)

Fine, captain, but now we come to a genuine difficulty. You're able to lie flush with the surface of the ocean, that I understand. 对，船长，可是这里有实际的困难。这样，您可以使船面跟洋面一致，我可以理解。 But low

英语听书《海底两万里》第218期 第16章 在海底平原散步(9)

These algae are a genuine prodigy of creation, one of the wonders of world flora. 这些海藻类实在是造化的奇迹，宇宙植物界的一个奇迹。 This family produces both the biggest and smallest vegetables in the world. 地球上最小和

英语听书《海底两万里》第168期 第12章 一切都用电(1)

These are the normal navigational instruments, I replied, and I'm familiar with their uses. 这些是航海家常用的仪器，我答，我知道它们的用法。我现在看见的这个表盘，上面有能转动的针，那不是流体压力计吗？