单词：chemical control method
单词：chemical control method 相关文章
AS IT IS 2013-09-24 Honoring the Victims of the Birmingham, Alabama Church Bombing 50 Years Ago From VOA Learning English, welcome to As It Is! Im Steve Ember. Today we remember a day 50 years ago this month when four African American girls were kill
2013年VOA慢速英语(九)月
Scientists Create Method to Test Food and Drugs for Purity Millions of people in developing countries have to be on guard against contaminated food and medicine. Some products could be harmful -- even deadly. In Nigeria, brake fluid was found in a pr
2017年VOA慢速英语(三)月
A: 欢迎大家来到这期的美语训练班! 我是杨琳! B: 我是Mike! 杨琳，来告诉大家今天都要学什么! A: 好! 今天，我们要一起来聊聊慈善捐款，看看如何表达货真价实，还要告诉你如何自控! B: Yeah,
美语训练班
[00:09.87]44) Edward Knipling [00:15.52]A leading American research scientist died last month at his home in Virginia. [00:22.88]Edward Knipling was ninety-one years old. [00:26.75]Mister Knipling was a world famous expert in the study of insects. [0
美国英语听力80篇
Health Report - Does a Birth Control Method Raise HIV Risk? 健康报道 - 避孕药物是否真会增加艾滋病毒感染风险？ This is the VOA Special English Health Report. 这里是美国之音慢速英语健康报道。 The World Health Orga
2011年VOA慢速英语(十)月
Chen Guoqi at the Ministry of Environmental Protection is in charge of air quality monitoring in north China. He said the industrial layout of the region is problematic and the adjustment process is slow. So severe problems have emerged in north Chin
2015CRI中国国际广播电台