单词:soil moisture tension
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40 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 ni
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.
Agriculture Report - Getting to the Root of How to Water Trees This is the VOA Special English Agriculture Report. Some trees can survive a long time without water. Think of trees that grow in the desert. But other trees may need more moisture than t
[00:00.00]Lesson 19 The Powerful Influence of Weather [00:13.60]天气的巨大影响 [00:27.19]Weather has a powerful effect on people. [00:30.97]天气对人们有巨大的影响。 [00:34.74]It influences people's health, intelligence,and feelings
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
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. 一些仙人掌,如撒瓜罗,能长到橡树那么高。但真正的树却需要比大多数
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 nineteenth century, the moveme
Reduction of Your Tension Alternate tasks blocking out an entire day or week for a high-priority project increases your anxiety without boosting your productivity -in fact, you may lose perspective and focus. You need to create a rhythm to your work
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
By Robert Berger Jerusalem 24 September 2007 Israel is playing down tensions with its arch-enemy to the north - Syria. As Robert Berger reports from VOA's Jerusalem bureau, there are new moves to bring Syria into the Middle East peace process. Prime
By Robert Berger Jerusalem 14 September 2007 In Israel, tension overshadowed the first Friday prayers for Ramadan, the Muslim holy month of fasting. As Robert Berger reports from VOA's Jerusalem bureau, the focal point of the latest tensions was the
By Nick Wadhams Nairobi 15 August 2007 The government of south Sudan says dialogue with the Sudanese government in Khartoum has completely broken down and a peace deal signed in 2005 is in jeopardy. As Nick Wadhams reports from Nairobi, tension conti
By Nick Wadhams Nairobi 09 August 2007 Tensions have flared between Uganda and the Democratic Republic of Congo after clashes along their disputed border resulted in the death of a British oil worker and the capture of four Ugandan soldiers. Nick Wad
By Gilbert da Costa Abuja 19 July 2007 A popular Islamic preacher in northwestern Nigeria has died, hours after being shot near a mosque. For VOA, Gilbert da Costa reports that confirmation of the cleric's death has set residents on edge. Residents o
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
白领英语晨读-131 Reduction of Your Tension 减轻压力
For those of us lucky enough to always have enough food and water, it may be hard to imagine living through a drought. A drought occurs for a variety of reasons, usually including a lack of rainfall and warm temperatures.Soil moisture severely dwindl
Drought For those of us lucky enough to always have enough food and water, it may be hard to imagine living through a drought . A drought occurs when for a variety of reasons, usually including a lack of rainfall and warm temperatures. Soil moisture
It is called Russias Davos - an annual summer solstice gathering where foreign company heads mix and mingle under one roof in St. Petersburg. With the British rocker Sting playing to the crowd, the Kremlin plans it as a lovefest for financial types.
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