单词:maltitudes
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Project Aims to Study Stratosphere Via Aerospace Firm's Glider A glider designed by Airbus Group successfully completed its maiden flight Wednesday ahead of next years attempt to reach the edge of the space. The ultimate goal is to study the stratosp
发表于:2018-12-08 / 阅读(81) / 评论(0)
VOA标准英语2015年(九月)
空客新飞机挑战新高度 Gliders are like engineless aircraft that are towed by powered planes to a certain height. From there, they use natural updrafts, also called mountain waves, to soar to the sky. That is why their wings are so much longe
发表于:2019-01-14 / 阅读(68) / 评论(0)
VOA标准英语2016年(一月)
Cosmic Radiation 上世纪早期,科学家发现一种神秘的辐射形式会破坏他们的实验。后来奥地利物理学家Victor Hess研究发现辐射可能来自天空。后来他多次坐热气球用各种仪器(包括测量放射电荷的
发表于:2019-02-24 / 阅读(80) / 评论(0)
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