单词:Wurtz lactose litmus agar
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LULU GARCIA-NAVARRO, HOST: And now to another major battle. President Trump hasn't yet nominated a replacement for Supreme Court Justice Anthony Kennedy, but the fight over confirming that nominee has already begun. It's going to be intense and expen
This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The ability to digest milk as adults, and as infants, actually, is due to the expression of an enzyme called lactase. That's the University of Pennsylvania's Sarah Tishk
This is Scientific American 60 Seconds. I'm Cynthia Graber. This'll just take a minute. In Europe and the near east, people went from being mobile hunter gathers to more settled agriculture way of life. But in Africa, no matters domesticated animals
At the same time, methanogens can use hydrogen and carbon dioxide produced by other bacteria to generate methane, 同时,产甲烷菌可以使用其他细菌产出的氢和二氧化碳以生成甲烷, which can reduce the total volume of gas by u
Books and Artts; Book review; 文艺;书评; Conundrums of science; 科学谜题; What is it for? 科学究竟有什么用? Scinece in the 20th century and beyond; by Jon Agar; 20世纪后科学;乔艾格著; SCIENCE works with problems b