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听力等级

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Intermediate 2022-05-06    
Do Dietary Guidelines Actually Contribute to Obesity

Keywords:

Steve: Dr. Marantz, good to talk to you today. Marantz: Hi, Steve. Steve: Very interesting paper you have here, "A Call for Higher Standards of Evidence for Dietary Guidelines." Let's cut right ...


Video 2022-05-06    
Learning from Mice - The Science of Transgenic Technology

Keywords:

What do humans, flies, and worms have in common? More than you might think. In fact, even scientists have been amazed to find that the genes that control early development in fruit fli...


British English 2022-05-05    
IBM's Centenary

Keywords:

IBM's centenary. The test of time. Which of today’s technology giants might still be standing tall a century after their founding? IT IS not, by any means, the world’s oldest company. There are J...


Pre-Intermediate 2022-05-05    
Diabetes in Children

Keywords:

A young girl reaches for a drink. She has had a long day. She opens a can of Coca Cola. She pours the cool black liquid down her throat. Mmmm - the real thing! The bright world of advertising! It s...


Intermediate 2022-05-04    
Science & America's Future

Keywords:

Rosner: The issue really is from my perspective whether or not there is in fact in a connection between consistently supported research, especially basic research, at national prosperity the extent of...


Video 2022-05-04    
Building Blocks of DNA

Keywords:

A, C, G, and T. Adenine, cytosine, guanine, and thymine. These are the four chemical building blocks of the DNA molecule. They are components of nucleic acid, which gives DNA its ton...


British English 2022-05-03    
US Environmentalism Under Fire

Keywords:

United States. Environmentalism under fire. Soaring emissions. The rhetoric about environmental controls killing jobs is getting louder and louder. Isn’t it strange, Republicans retort, that peop...


Pre-Intermediate 2022-05-03    
Life in the 1970s & 1980s

Keywords:

In some ways,the nineteen eighties seemed like the opposite of the nineteen sixties.The sixties were years of protest for social justice and change.Many Americans demonstrated against the Vietnam War....


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