by Jason Marshall A few months ago we talked about how to multiply fractions. Now that were comfortable doing this and weve talked about a few applications of multiplying fractions such as how to convert units and how to estimate how fast someone is

发表于:2018-12-07 / 阅读(48) / 评论(0) 分类 数学英语

Dr Molnar s interest was piqued at a conference in 2013, Molnar博士的兴趣源于2013年的一次会议, when Karen Kinemuchi, another astronomer, presented some puzzling findings on a particular star seen by Kepler, a space telescope designed c

发表于:2018-12-30 / 阅读(58) / 评论(0) 分类 经济学人科技系列

THIS IS AMERICA - Debate Over Electronic Voting By Jill Moss Broadcast: Monday, July 05, 2004 (MUSIC) VOICE ONE: Welcome to THIS IS AMERICA, in VOA Special English. I'm Gwen Outen. VOICE TWO: And I'm

发表于:2019-01-11 / 阅读(114) / 评论(0) 分类 This is America

Four months after the historic first-ever detection of gravitational waves, scientists said they have directly detected another gravitational wave washing over the Earth. 在引力波历史性的首次检测到四个月之后,科学家们近日表示

发表于:2019-02-02 / 阅读(58) / 评论(0) 分类 英语新闻

With consumers rushing to buy the latest gadgets, the problem of what to do with discarded electronic products is becoming a growing environmental concern. Although electronic recycling is not yet as popular as paper and plastic recycling, two Americ

发表于:2019-02-12 / 阅读(59) / 评论(0) 分类 VOA标准英语2010年(七)月

By the next showing Ive had refined the playful model. 在下一次展示之前,艾弗又完善了这个模型。 This time Jobs, with his binary view of the world, raved that he loved it. 这一次,乔布斯带着他那不是杰作就是狗屎的评

发表于:2019-02-15 / 阅读(54) / 评论(0) 分类 乔布斯传