clean, efficient, sustainable: the three pillars of solar concentrated solar thermal power plants - 五角形 形狀 個影片檔及 b 捲影像00:15
solar thermal power generation: concentrated technology leading the sustainable development era - 五角形 形狀 個影片檔及 b 捲影像00:22
tractor-like tanks roll toward camera on solomon island / single propeller plane flies toward and past camera as it is landing / single engine plane... - 五角形 形狀 個影片檔及 b 捲影像00:42所羅門群島