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[00:05.12]American researchers say a new, low-fat substitute for butter could reduce the risk of heart attack and stroke for millions of people. [00:17.76]The new food product is made from vegetable oil with added substances called sterol esters. [00

发表于:2018-12-26 / 阅读(81) / 评论(0) 分类 美国英语听力80篇

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(92) / 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(118) / 评论(0) 分类 Scientific American(四)月
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