单词：squirrel cage dynode
单词：squirrel cage dynode 相关文章
China's Ministry of Environmental Protection is warning the air across much of northern China is going to remain seriously polluted through the night. The smog shrouding northern and eastern China has been forcing highway closures and flight cancella
英闻天下
Heavy smog shrouded Beijing on Wednesday October 19, and a yellow alert, the third-highest warning level, was issued by the environmental authorities on Tuesday, the Legal Daily reported. The yellow alert means the Air Quality Index will exceed 200 f
2016CRI中国国际广播电台
After a couple of weeks of relatively clear and blue skies, smog blankets large parts of northern China again, including Beijing, Tianjin, and Hebei province. The Ministry of Environmental Protection says the smog will linger for another five days in
cctv9英语新闻2017年
BEIJING, Feb.17 (Xinhua) -- Fresh smog shrouded Beijing and some other provinces in China early on Sunday, disrupting highway traffic and flights. Readings for PM2.5, hazardous particles measuring 2.5 microns in diameter or less, exceeded 200 microgr
英语新闻
BEIJING, Jan. 31 (Xinhua) -- Smog blanketing large swaths of China was thinning out on Thursday, with air pollution in some cities easing, the Ministry of Environmental Protection (MEP) said. According to monitoring by 10 a.m., smog-hit regions had s
英语新闻
Despite the recent air pollution here in Beijing, residents still hold different opinions on whether or not to light fireworks this coming Spring Festival. For celebrating the festival, I think setting off fireworks has its special meaning. And I don
英闻天下