瑞士太阳能飞机开启环球之旅。HOW do planes fly? Most planes fly by oil. But Solar Impulse 2 (阳光动力2号) is different. Without a drop of oil, it is powered only by sunlight. Early this March, this plane will begin its five-month world trip.
21世纪报社版权所有，未经书面授权，禁止转载或建立镜像。 主办单位：中国日报社 Copyright by 21st Century English Education Media All Rights Reserved 版权所有 复制必究 京ICP备13028878号-12京公网安备 11010502033664号
京公网安备 11010502033664号
