发表于:2019-01-03 / 阅读(51) / 评论(0) 分类 医务英语

This is Scientific Americans 60 second Science, I am Steve Mirsky. If you have paraskevidekatriaphobia, today is not your day. Thats right, paraskevidekatriaphobia is fear of Friday the 13th and the accidents, mishaps and misfortunes thought by some

发表于:2019-01-08 / 阅读(64) / 评论(0) 分类 Scientific American(四)月

Rubber May Soon Come from Weed 橡胶或很快能从杂草提炼 People have been using products made with synthetic rubber for more than a century. But high-quality tires for cars, trucks and aircraft still must contain 40 percent or more natural ru

发表于:2019-01-12 / 阅读(50) / 评论(0) 分类 2014年VOA慢速英语(九)月

Rubber May Soon Come From Dandelions Synthetic rubber has been around for more than a century, but quality tires for cars, trucks and aircraft still need up to 40 percent or more natural rubber content. As the source of natural rubber, the rubber tre

发表于:2019-01-14 / 阅读(50) / 评论(0) 分类 VOA标准英语2014年(八月)