单词：occluded phosphate
[土壤] 闭蓄态磷酸盐
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Incredibly, whales are closely related to hoofed animals, in particular, the pig and the hippo. 很难相信，鲸类跟有蹄类动物的关系非常接近，特别是，猪和河马。 55 million years, the actual evolutionary origins of whales and
发表于:2018-12-28 / 阅读(107) / 评论(0)
侏罗纪搏击俱乐部
侏罗纪搏击俱乐部
pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con
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医务英语
医务英语
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a
发表于:2019-01-08 / 阅读(178) / 评论(0)
Scientific American(四)月
Scientific American(四)月