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(59) / 评论(0) 分类 医务英语

Planktonic - a form of life style in which an organisms floats freely in a fluid without significant attachment or association with other living forms. Plaque is a film of bacteria in a matrix of sali

发表于:2019-01-03 / 阅读(91) / 评论(0) 分类 医务英语

This is the VOA Special English Health Report. Autumn and winter are cold and flu season -- when people are most likely to catch the viruses that cause influenza and the common cold. Is the old advice true that dressing warmly will help prevent a co

发表于:2019-01-11 / 阅读(53) / 评论(0) 分类 VOA慢速英语2008(十)月

67 维生素C能否破坏DNA? DATE=7-11-01 TITLE=SCIENCE REPORT - Vitamin C and DNA BYLINE=Nancy Steinbach (Start at 59

发表于:2019-01-30 / 阅读(67) / 评论(0) 分类 科技之光

Science and technology 科学技术 Marine biology 海洋生物学 Scents and sensibility 气味与识别 Turtles love a smell that humans loathe. For them, it means dinner 海龟喜欢一种人类讨厌的味道,对它们来说,这表示大餐 J

发表于:2019-02-18 / 阅读(37) / 评论(0) 分类 经济学人科技系列

French nuclear energy 法国核能 Under pressure 压力之下 France wants to export nuclear reactors. Who will buy them? 法国想出口核反应堆,谁人将买? FOR France, nuclear power has long been a source of national pride. Its European

发表于:2019-02-24 / 阅读(71) / 评论(0) 分类 经济学人综合