标签：soil 相关文章
The U.S. state of California has been suffering a historic drought. Three years ago, its governor declared a drought state of emergency. Late last year, 97 percent of California was in drought. But today, the U.S. drought monitor says less than 60 pe
CNN美国有线新闻2017年1月
This is the VOA Special English Agriculture Report. Mulch is material spread over soil. It protects against wind and rain damage. It can also limit weed growth. Finding materials for organic mulch can be easy. Small pieces of tree bark or cut up lea
VOA慢速英语2009年（六）月
This is the VOA Special English Agriculture Report. Even in ancient times, people liked to eat lettuce. Egyptians and Romans served the green, leafy vegetable at the end of dinner. Now, people in some countries start the meal with lettuce as part of
VOA慢速英语2009年（四）月
This is the VOA Special English Agriculture Report. Earlier this month, Michelle Obama and twenty-three schoolchildren helped prepare the ground for an organic vegetable garden on the South Lawn of the White House. The first lady showed the young ga
VOA慢速英语2009年（三）月
VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Bob Doughty. VOICE TWO: And I'm Faith Lapidus. This week, we will tell about one explanation for many trees dying in the western United States. We will tell about a project to make e
VOA慢速英语2009年（二）月
真不错，京郊的农家乐竟然还有快乐采摘的活动。看这边，丹尼尔站在梯子上摘苹果，爸爸帮忙扶着，可又会有什么发生呢？一起来看看吧。 Listen Read Learn Daniel: Daddy, I love this Happy Farmhouse. It's really fun. Benjamin: Great. But no talking, now. Don't f
英语口语大赢家
This is the VOA Special English Agriculture Report. True or false? Potatoes are root vegetables. False. Potatoes are underground stems called tubers. Most kinds of potatoes can be planted during cool weather. But John Masiunas of the University of I
VOA慢速英语2009年（三）月
Agriculture Report - In the Garden: Growing Beets 农业报道 - 菜园系列：如何种植甜菜 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 Beets are a tasty root vegetable that do not requi
2013年VOA慢速英语(三)月
Agriculture Report - Building a Windbreak to Protect Crops 农业报道 - 营造防风林保护庄稼 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 Soil conservation methods help farmers protect
2011年VOA慢速英语(七)月
Agriculture report - Project in DRC Aims to Increase Fertilizer Use This is the VOA Special English Agriculture report. North Kivu is a war-torn province that used to be called the breadbasket of the Congo. Now, some farmers are being trained to incr
2012年VOA慢速英语(八)月
By Phuong Tran Dakar 27 December 2006 Only days away from the end of the United Nations' Year of Deserts and Desertification, four experts discuss the challenges of translating a decade's worth of research about the degradation of land in arid areas
2006年VOA标准英语（十二月）
Study: Nature Creates Buffer Against Climate Change The study focused on semi-arid ecosystems which cover 40 percent of the planet and support 40 percent of the human population. Co-author David Eldridge, with the School of Biological, Earth and Envi
VOA标准英语2012年(一月)
Being so high also made the powers perfect strategic location, the sheer cliffs on three sides, and the steep summit made the city door virtually impregnable. (From here the slopes are very steep, any invaders would find it almost impossible to climb
自然百科2013年
当他说出那句： If I was your son, Mr chairman, I believe I'd make you very proud. 如果我是你的孩子，你一定会以我为荣。 真是自信hold满全场呀！ Zach 对家庭定义的理解可能比很多来自普通家庭的人都要深
英语新闻视频
land,soil 土壤 arable land, tilled land 耕地 dry soil 旱田 fertile soil 沃土,肥沃的土壤 humus 腐殖质 irrigable land 水浇地 lean soil, poor soil 贫瘠土壤 wasteland, barren land 荒地 grass 草 grassland 草地 meadow 草甸 prairie 大草原 pasture land 牧场
英文语法词汇
According to a report released by the China Geological Survey (CGS), the country's largest geoscience agency, 7.6 million hectares of arable land - roughly the size of Ireland - have been affected by lead and other heavy metals. Nearly one third of t
2015CRI中国国际广播电台
Topics: Ask an American: driving while texting; ground versus soil versus land; as such; pupil versus people Words: eyewitness report to lose control apparent median to clip to flip distraction visual to glance manual cognitive to take (ones) mind of
美语听力 English Cafe
Don: Hey, Yael, Have you heard? We've discovered two new oceans? Yael: Where? D: On Mars. Well, they aren't there any longer, but they were there a few billion years ago. Y: I thought scientists weren't sure if Mars had oceans or not. D: They weren't
英语听力文摘 English Digest
How Rocks Appear In Your Garden 岩石，是在地质作用下形成的矿物聚合体，其中海面下的岩石称为礁、暗礁及暗沙，由一种或多种矿物组成的，具有一定结构构造的集合体，也有少数包含有生物的遗骸
英语听力文摘 English Digest
Sugar bowls and hole 孔隙是岩土固体矿物颗粒间的空间。岩土中直径大于1毫米、重力水可于其中自由运动的孔隙，是大孔隙（macro-pore，large pore）。岩土中直径为0.01～1毫米、重力水和毛管水可存其
英语听力文摘 English Digest