黎明时分,天空由微红转为淡淡的金黄色时,在美国加利福尼亚州爱德华兹空军基地的人们,开始在乾燥的河床上忙碌起来。他们把测风仪架到长长的伸缩杆顶端,测试着风速和风向。一架永不降落的飞机正要从这里飞向天空。装在狭长机翼上的由电机带动8个螺旋桨转动了,随着机轮在乾燥土地上加快滚动,巨大机翼垂下的翼尖立刻向上抬升。升为逐步增加,机翼也越发向上弯曲,当这架以太阳能为 At dawn, when the sky turned from reddish to faintly yellowish, people at Edwards Air Force Base in California began to get busy in the dry riverbed. They mounted the anemometer to the top of a long retractable pole to test the wind speed and direction. A never-ending plane is about to fly from here to the sky. Eight propellers propelled by a motor mounted on a long, narrow wing revolve. As the wheel accelerates on dry ground, the wingtips of the huge wings lift up immediately. Ascended to a gradual increase, the wings bent upward more and more, when the solar energy for this frame