单词：transparency vitreous silica
单词：transparency vitreous silica 相关文章
Plant Self-defense Plants may appear to be helpless in the face of hungry,toothy animals but many plants have evolved interesting systems of self-defense. Coarse meadow grasses are a good example. If you run your finger along a blade of coarse grass,
英语听力文摘 English Digest
AS IT IS 2015-07-14 Silica Sand Mining Worries Communities 美国硅砂矿引发社区担忧 The United States is increasing production of oil and natural gas through a process known as fracking. This process is sometimes called hydraulic fracking be
2015年VOA慢速英语(七)月
AILSA CHANG, HOST: Despite mounting evidence and a stream of dire warnings, federal regulators and mining companies failed to protect coal miners from toxic dust. MARY LOUISE KELLY, HOST: NPR and the PBS series Frontline spent more than a year lookin
2018年NPR美国国家公共电台12月
BEIJING, April 19 (Xinhua) -- China's environmental watchdog said on Thursday that it will work to promote the prompt disclosure of air quality reports and monitoring results for other types of pollution. The disclosure of information on major pollut
英语新闻
BEIJING, Aug. 2 (Xinhua) -- The Red Cross Society of China (RCSC) has vowed to establish an efficient, transparent and normative system of management, information and supervision in three to five years. Zhao Baige, executive vice president of the RCS
英语新闻
BEIJING, July 31 (Xinhua) -- The State Council, or China's cabinet, has pledged to encourage the Red Cross Society of China (RCSC) to boost its transparency in a guideline issued Tuesday. The RCSC and its branches should, as required, disclose inform
英语新闻