欧洲发射任务以创建模拟日食 Two European satellites were recently launched on a mission that will include a simulated total solar eclipse.
欧洲发射任务以创建模拟日食 Two European satellites were recently launched on a mission that will include a simulated total solar eclipse.
美国太阳能农场让饥饿的羊群上岗工作 A group of sheep on farmland in the American state of Texas work together to complete a job: eating the grass growing beneath hundreds of solar panels.