单词：surface soil layer
单词：surface soil layer 相关文章
EXPLORATIONS - Mars Exploration, Part 2 By Paul Thompson Broadcast: Wednesday, February 04, 2004 (THEME) VOICE ONE: This is Shirley Griffith. VOICE TWO: An artists picture of a Mars Rover vehicle. And
Explorations
It's a common enough sound in summer, after the wind finally picks up on a hot and humid afternoon, as the rain starts spattering down in big, fat drops--you're in for a full-blown thunderstorm. It's much less common in winter, even during a snow sto
英语时差8，16
Water on the Moon Studies in the journal Science report that instruments on three different spacecraft have found evidence for widespread trace amounts of water on the moon. Karen Hopkin reports For all you space buffs who like to keep track of wher
60秒科学
By Gary Garriott Broadcast: July 29, 2003 This is Bill White with the VOA Special English Agriculture Report. Soil conservation efforts protect soil from wind and water that can blow or wash it away.
VOA2003（下）-农业与经济
as it is 事实上，实际上 be running out of 用尽，用完 beneath 在之下 capsule 容器 cause ...to 导致 （使处于的结果 ） collapse 坍塌 drill 钻孔 explosive 炸药 keep in touch with 与保持联系 layer 层 lose heart 失望，
新概念英语第二册单词MP3
For all you space buffs who like to keep track of where the water is, it looks like you can add our very own moon to your list. Because according to a trio of papers appearing in the journal Science, the lunar surface is wetter than we realized. Fort
Scientific American(九)月
Why does Florida have so many springs? Florida sits on a layer of porous limestone which acts as an underground reservoir or aquifer. This aquifer can absorb huge amounts of water. Where the pressure is great enough, springs bubble up, spewing up bil
自然百科2009年
Healing Elbows And Eyeballs A scratch to the surface of your eye heals quite rapidly, often in a matter of minutes. But a surface scratch on your elbow takes days rather than minutes to heal. The reason for these different rates of healing is directl
英语时差8，16
There is a special day to recognize the importance of the ozone layer. In 1995, the United Nations General Assembly decided September 16th is the International Day for the Preservation of the Ozone Layer. This is the date on which countries signed th
英语课程学习计划和讲义
How Rocks Appear In Your Garden I wonder how many of us went out this past spring to get our gardens ready for planting, smug in the thought that last year we got rid of all the rocks. Theres that nice big mound of them in the corner of the garden wh
英语听力文摘 English Digest
Mars Rover to Begin Taking Soil Samples This Week Jessica Berman NASA engineers say the Mars rover will begin taking its first soil samples as soon as it departs the landing platform . Engineers say t
VOA2004（上）--各类新闻
Mantle 地幔 We are living on the surface of the Earth. 我们生活在地球表面。 So, what is inside the Earth? 那么，地球内部是什么？ There is a mantle under the surface of the Earth. 地球表面以下是地幔。 The mantle takes
与美国小学生一起学英文第7册
Recently at a site only two kilomtres to the southeast, archaeologists have unearthed the first traces of people living in the same period. It's a find that may finally answer why stonehenges located where it is. Here is the section through one of th
探索与发现2015年
DEVELOPMENT REPORT - Need to Dig a Well? Start HereBy Gary Garriott Broadcast: Monday, May 15, 2006 This is Shep O'Neal with the VOA Special English Development Report. There are several low-cost ways
2006年慢速英语（五）月
We are rediscovering the enigmas(谜团) of the Moon and they're really in our own backyard Dr Jim Garvin, Nasa Goddard Space Flight Center Moon water has world in a twitter A surprising amount of water has been found to exist in the Moon's soil. Data
英语新闻
很多参加gre的考生在做gre写作的时候都没有写提纲的习惯，这是非常不好的。提纲在gre写作当中起到了至关重要的作用。从今天起，我们将对gre issue进行分析，弄清写作思路，这样才能让gre
GRE作文
Why lips go dry？ 为什么嘴唇会干呢？ Lets start by reviewing the ways in which the surface of our lips is different from the surface of the skin on the rest of our bodies. Basically, our lips are made of the same mucus membrane that coats t
英语听力文摘 English Digest
It's a common enough sound in summer, after the wind finally picks up on a hot and humid afternoon, as the rain starts spattering down in big, fat drops--you're in for a full-blown thunderstorm. It's much less common in winter, even during a snow sto
英语听力文摘 English Digest
Plants in the Deserts Some cacti, like the saguaro, grow to tree size, but true trees need more moisture than most desert environments can supply, so they are scarce on deserts. Close to streambeds, cottonwoods can sometimes be found. Though these st
双语有声阅读
Voice 1 Thank you for joining us for todays Spotlight. Im Joshua Leo. Voice 2 And Im David Bast. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 In the ea
环球英语 Spotlight