This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. There's a huge, gunky brown cloud that lingers over south Asia and the Indian Ocean each winter. Its been known to cause respiratory diseases and even

发表于:2018-12-24 / 阅读(59) / 评论(0) 分类 Scientific American(一)月

The Associated Press reports Monday that Rolls-Royce will temporarily replace entire engines on A380 Superjumbo jets, after an oil leak in an engine earlier this month caused a fire in the engine and a catastrophic failure. British jet-engine maker R

发表于:2019-01-14 / 阅读(40) / 评论(0) 分类 VOA标准英语2010年(十一)月

The engines powering the Royal Navys cutting-edge fleet of Type 45 destroyers are unable to operate continuously in the warm waters of the Gulf, MPs were told on Tuesday. 周二,英国国会议员们被告知,英国皇家海军(Royal Navy)最先进

发表于:2019-02-08 / 阅读(62) / 评论(0) 分类 英语新闻

第一条微博如下: Greetings to my friends in China! It has been too long! I last visited China in 2006 when I took part in a physics conference in Beijing. It was an extraordinary experience. My first trip was in 1985 when I travelled across y

发表于:2019-02-09 / 阅读(98) / 评论(0) 分类 阅读空间

The World Health Organization, upgrading a previous warning, said June 12 that diesel exhaust causes cancer and called for tighter emissions standards, comparing the risk of exhaust to second-hand cigarette smoke. Tuesdays announcement comes after in

发表于:2019-02-17 / 阅读(56) / 评论(0) 分类 英语新闻

Business 商业报道 Civilian jet engines 民用航空发动机 Gearing up for a fight 奋力一战 Pratt amp; Whitney hopes a high-tech engine will restore its former dominance. 普拉特惠特尼公司期待其新款的高科技航空发动机能重

发表于:2019-03-09 / 阅读(150) / 评论(0) 分类 经济学人商业系列