[化] 氰基; 腈基

Facebook published detailed guidelines Tuesday for what users can and cannot post on the social media service. Earlier this month, lawmakers called on Facebook chief Mark Zuckerberg to appear in Congress. They demanded that his company take more step

发表于:2018-12-08 / 阅读(35) / 评论(0) 分类 2018年VOA慢速英语(四)月

From VOA Learning English, this is the Health Lifestyle report. Most of us know that physical activity leads to better health. That is nothing new. But for the first time in 10 years, the United States government has changed its guidance on how much

发表于:2018-12-10 / 阅读(43) / 评论(0) 分类 2018年VOA慢速英语(十一)月

Facebook published detailed guidelines Tuesday for what users can and cannot post on the social media service. Earlier this month, lawmakers called on Facebook chief Mark Zuckerberg to appear in Congress. They demanded that his company take more step

发表于:2019-01-03 / 阅读(72) / 评论(0) 分类 2018年VOA慢速英语(四)月

US Government Asks Americans to Eat Less, Exercise More 美政府呼吁美国人少吃多运动 The U.S. government is asking Americans to eat less and exercise more in an effort to stem the country's

发表于:2019-01-03 / 阅读(38) / 评论(0) 分类 VOA2005(上)--环境科学探索

BEIJING, Feb. 5 (Xinhua) -- China on Tuesday unveiled reform guidelines on income distribution amid growing public concerns over a widening wealth gap. The guidelines encourage further work to improve the initial distribution system and stepped-up ef

发表于:2019-02-03 / 阅读(64) / 评论(0) 分类 英语新闻

The American Heart Association is out with a new set of guidelines aimed at preventing heart disease in women. Although, heart disease is thought to mainly affect men, it is actually an equal opportunity killer. These are the first heart-health tips

发表于:2019-02-18 / 阅读(34) / 评论(0) 分类 英语新闻