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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

发表于:2019-01-03 / 阅读(186) / 评论(0) 分类 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(229) / 评论(0) 分类 Scientific American(四)月

还在讨论宅女、鱼干女吗?那你就out啦。现在在时尚界大行其道的是森林系女孩,简称森女,她们享受当下的幸福,不崇尚名牌,衣着有如走出森林的自然风格。记住哦,她们的英文名字叫做

发表于:2019-01-08 / 阅读(182) / 评论(0) 分类 英语口语
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