创新英语-Scientists Create Energy-Making Artificial Leaf

Scientists at the Massachusetts Institute of Technology (MIT) have created what could be a breakthrough in providing clean, alternative energy. Researchers have invented an artificial leaf that splits water into hydrogen and oxygen and stores the ene

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AGRICULTURE REPORT - Don't Know Much About Mulch?By George Grow Broadcast: Tuesday, January 24, 2006 I'm Faith Lapidus with the VOA Special English Agriculture Report. Mulch is important to farmers. M

VOA慢速英语2009-Agriculture Report - In the Garden, Making t

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2013 Agriculture Report - Getting a Firm Grip on Weed Control

Agriculture Report - Getting a Firm Grip on Weed Control 农业报道 - 控制杂草生长的办法 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 When is a plant considered a weed? Experts at Pen

VOA慢速英语2009-Agriculture Report - Do-It-Yourself: Compost

This is the VOA Special English Agriculture Report. Compost is a dark, rich material added to soil to improve it. Compost is produced when bacteria and fungi break down organic matter, aided by insects, earthworms and other organisms. This natural r

VOA慢速英语2009-Agriculture Report - The Seeds of Weed Control

This is the VOA Special English Agriculture Report. When is a plant considered a weed? Experts at Penn State University have a simple answer: When its undesirable qualities outweigh its good qualities. Consider this: Crops generally produce several

VOA慢速英语2011--In the Garden: Getting Started With Rose

Agriculture Report - In the Garden: Getting Started With Roses 农业报道 - 从种植玫瑰开始 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 Most kinds of rose plants come from Asia. But ros

VOA慢速英语2011--Ideas for Getting a Firm Grip on Weed Co

Agriculture Report - Ideas for Getting a Firm Grip on Weed Control 农业报道 - 控制杂草生长的办法 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 Weeds compete with plantings for water

VOA慢速英语2012 Agriculture Report - In the Garden: Growing Roses

Agriculture Report - In the Garden: Growing Roses 农业报道 - 在花园中如何种植玫瑰？ This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 Most kinds of rose plants are native to Asia. But

Home Gardens, Part 3

By Mario Ritter Broadcast: September 23, 2003 This is Steve Ember with the VOA Special English Agriculture Report. Today we finish our series on home gardens. One of the hardest parts can be caring fo

VOA慢速英语 2008 0318a

Agriculture Report - The Seeds of Weed Control Advice for suppressing the growth of unwelcome plants. Transcript of radio broadcast: 17 March 2008 This is the VOA Special English Agriculture Report. When is a plant a weed? When its undesirable quali

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Why mulching is one of the best things to do for plants. Transcript of radio broadcast: 14 July 2008 This is the VOA Special English Agriculture Report. Mulch is spread in a city park in Atlanta, Georgia Mulch is important to farmers. Mulch is a pro

VOA慢速英语 2007 0403a

This is the VOA Special English Agriculture Report. Spreading mulch Mulch is important to farmers. Mulch is a protective cover of material that is spread on top of soil. It is usually made out of organic material, like crop waste. Farmers may keep t

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This is the VOA Special English Agriculture Report. When is a plant considered a weed? Experts at Penn State University have a simple answer: When the undesirable qualities outweigh the good qualities. Consider that crops generally produce several hu

VOA慢速英语2013 Getting a Firm Grip on Weed Control

Getting a Firm Grip on Weed Control This is the VOA Special English Agriculture Report. When is a plant considered a weed? Experts at Penn State University have a simple answer: When the undesirable qualities outweigh the good qualities. Consider the

VOA慢速英语2012 Agriculture Report - Getting a Firm Grip on Weed Control

Agriculture Report - Getting a Firm Grip on Weed Control 农业报道 - 严格控制杂草 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 When is a plant considered a weed? Experts at Penn State U

Artificial Leaf Turns Sunlight into Electric Power

Scientists at the Massachusetts Institute of Technology have turned to Mother Nature for inspiration, inventing a device that mimics photosynthesis, the process plants use to convert sunlight and water into usable energy. MIT chemistry professor Dani

学个词Learn a Word 第1713-artificial

今天我们要学的词是 artificia。Artificial 人造的。artificial intelligence 人工智能。不久前，The FDA approved a new artificial retina device that would help some people regain part of their sight. 美国食品和药物管理局批准

AGRICULTURE REPORT - Mulch

AGRICULTURE REPORT - September 3, 2002: Mulch By George Grow This is Bill White with the VOA Special English AGRICULTURE REPORT. Mulching is one of the best things people can do for their plants. Mulc

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Artificial Speech Mimics Real Thing 合成声音发展渐入佳境 未来虚拟声音真假难辨 At a University of Arizona laboratory, Professor Brad Story analyzes the voices of singers, actors and public speakers both live and on audio tape. 在亚