标签：nutrient 相关文章
a lot of [much or many] We had a lot of rain. carry out [to do; to put into effect] Please carry out the plan. pass a bill [approve] Congress is expected to pass a bill to cut taxes. take steps [to start to do something] The government will take step
VOA慢速英语1500基础单词例句
This is the VOA Special English Agriculture Report. Fertilizer use differs from country to country, and from too little to too much. Nitrogen and phosphorus can produce big crops. But they can also pollute water and air. A recent policy discussion i
VOA慢速英语2009年（七）月
DAVID GREENE, HOST: This summer, a record-setting dead zone has appeared in the Gulf of Mexico. This is a zone where water does not have enough oxygen for fish to survive. One major cause of this is pollution from farms. And this has provoked a debat
2017年NPR美国国家公共电台8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
By Brian Wagner Miami 21 June 2007 Scientists are seeking new ways to reverse the buildup of carbon dioxide in the atmosphere that many believe is the cause of global warming. Today on Searching for Solutions, VOA's Brian Wagner reports that one proj
2007年VOA标准英语（六月）
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 David McAlary Washington 23 November 2006 Scientists have genetically engineered two crops in a way they say will help improve nutrition in poor countries. One group has boosted the levels of certain nutrients in wheat and another team has made t
2006年VOA标准英语（十一月)
By Carol Pearson Washington 23 May 2008 Breast cancer researchers have recently come to some important conclusions for women. The universities of Chicago and Toronto released a study that shows a link between the spread of breast cancer and vitamin D
VOA标准英语2008年（五月）
Dietary Changes May Ease Climate Change Some scientists are advising a dietary approach to climate change. They say eating less meat can mitigate the effects of rising temperatures. However, the recommendation is being made at a time when meat consum
VOA标准英语2012年(六月)
New York Sugary Drink Ban Targets Obesity Do you really need 450 grams, 560 grams, 900 grams of sugary soda? These are all quantities regularly sold and consumed in the United States. Mayor Bloomberg said enough with his proposed ban on the sale of s
VOA标准英语2012年(六月)
Study: Vitamin B12 Deficits in Older Adults Linked to Brain Decline
VOA标准英语2011年(十月)
By Melinda Smith Washington, D.C. 07 June 2007 For years, doctors urged women to take folic acid if they planned to get pregnant. Then researchers discovered the nutrient helped reduce the risk of a heart attack. But now a new study shows folic acid
2007年VOA标准英语（六月）
Almost all cells need iron to grow. Now, researchers have identified a link between the body's system for regulating iron and breast cancer. The discovery could help doctors predict the course of breast cancer disease and even help them decide the mo
VOA双语新闻 2010年8月
Australia is preparing to introduce technology that allows algae to capture half or more of the greenhouse gases emitted by a power station. The micro-algae thrive on carbon dioxide, producing food for livestock as well as biofuels and material for p
VOA双语新闻 2009年9月
Every spring, the Mississippi River dumps tens of thousands of tons of nutrient runoff into the Gulf of Mexico. Add temperature, current and wind to that pollution, and you have the Western Hemisphere's largest stretch of oxygen-poor watersa so-calle
2017年Scientific American(二)月
Heres the surprise entry into search for life, this little moon that youd expect to be pretty dead and dull, and coming out of the South Pole of it is a jet of water ice, all the things you need for life are there. Theres an energy source, theres a w
自然百科2012年
On this hot summer afternoon outside Brattleboro Vermont, farmer Dean Hamilton has fired up his tractor and is fertilizing his hay filled with urine. It takes a bit of time to get used to the idea, says environmental engineer Nancy Love. Ive been sur
VOA标准英语2018年(十二月)
Australia is preparing to introduce technology that allows algae to capture half or more of the greenhouse gases emitted by a power station. The micro-algae thrive on carbon dioxide, producing food for livestock as well as biofuels and material for
VOA标准英语2009年(九月)
Every spring, the Mississippi River dumps tens of thousands of tons of nutrient runoff into the Gulf of Mexico. Add temperature, current and wind to that pollution, and you have the Western Hemisphere's largest stretch of oxygen-poor watersa so-calle
2017年Scientific American(二)月
Studies suggest that when we eat a variety of foods, we are less likely to get bored. But therefore we are more likely to eat more. That might contribute to the current obesity problem in Americapeople like the taste of different foods and keep eatin
英语听力文摘 English Digest