单词：small sample bias
单词：small sample bias 相关文章
[00:05.15]第十三部分 化验取样 [00:10.29]1.The first test is no problem, [00:12.92]做第一项检查没有问题, [00:15.54]but the second one has to be done on an empty stomach. [00:33.78]但第二项目得空腹做. [00:52.01]2.How long do I have to fast? [01:01.04]
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This is Scientific America 60-second science, I'm Sophie Bushvick, got a minute? All humans evolve to find certain female traits attractive across cultures because the signal of potential means reproductive potential. Right? Actually a new study find
Scientific American(六)月
All humans involved to find certain female traits attractive across cultures because they signal a potential mate's reproductive potential. Right, Actually, a new study finds that cultural norms can also play a big part at least when it comes to big
Scientific American(六)月
This is Scientific American's Sixty Seconds Science. I'm Sophie Bushwick. Got a minute? To monitor the biodiversity of the freshwater habitat, you could compare by the water and count the rare wildlife. Or you could just scoop up a cup of water. A ne
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By Mil Arcega Washington, D.C. 29 January 2007 watch Georgian Uranium report Georgian authorities have disclosed the arrest of a Russian man last year on charges of smuggling contraband uranium. Russian scientists confirmed the radioactive material
2007年VOA标准英语（一月）
She goes to the market. She wants to buy blueberry muffins. She is not sure if it tastes good. She finds an employee, and asks for a sample. The employee cuts a small piece, and gives it to her. She tries it. It is good. She buys the pack of muffins.
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