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Let us study more closely the way in which a plant grows. The root pushes itself down into the earth. If it finds no water, it soon dies. If it finds water, it begins to suck it up and change it into
自考英语（一）78讲
AS IT IS 2015-11-02 Can Fish Teach Humans to Regrow Teeth? 人类能学习鱼类的牙齿再生术么? Most people are born with two sets of teeth. They use baby teeth to break down food as children. As they become adults, the baby teeth are replaced
2015年VOA慢速英语(十一)月
ARI SHAPIRO, HOST: For the first time, scientists have altered the DNA in human embryos to make a fundamental discovery about early human development. Scientists say this proves that modifying genes and human embryos can reveal powerful insights into
2017年NPR美国国家公共电台9月
The current UN under-secretary general for Economic and Social affairs has revealed the UN is working on a new set of development plans once the current window for the Millennium Development Goals is reached in 2015. CRI's Hong Kong correspondent Xu
英闻天下
This is China's final progress report on the MDGs before the adoption of the post-2015 development agenda later this year. According to the report, China has seen unprecedented transformational results in accomplishing the vision that was set out by
英语新闻
WASHINGTON, April 16 (Xinhua) -- Researchers at the University of Colorado (CU) have found that lack of a specific gene interrupts neural tube closure, a condition that can cause death or paralysis. The study was the cover story this week in the jour
英语新闻