音标:[siŋkætә'litik] ;
共催化的

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发表于:2018-12-30 / 阅读(368) / 评论(0) 分类 英文魔法师字源大挪移

Diesel fuel in the US and the fumes from diesel engines are about to get a whole lot cleaner. As of today, the Environmental Protection Agency is requiring much of the diesel in the country to have 97% less sulfur in it. It's the start of a project

发表于:2019-01-07 / 阅读(422) / 评论(0) 分类 2006年NPR美国国家公共电台

HEALTH REPORT - Blood Pressure Drugs May Prevent Dry Eye Syndrome By Jerilyn Watson Broadcast: Wednesday, April 07, 2004 This is the VOA Special English Health Report. Many people around the world suf

发表于:2019-01-19 / 阅读(386) / 评论(0) 分类 健康与经济

Volkswagen has devised a new catalytic converter that could fix the majority of the cars in the US affected by the diesel emissions scandal, as details emerge of its attempts to satisfy regulators. 大众汽车(Volkswagen)设计出一种新的催化转

发表于:2019-02-08 / 阅读(322) / 评论(0) 分类 英语新闻