世界范围内有20％的总发电量被用于照明。
Worldwide about 20% of all electricity generated is used for lighting.
全球20%的电力被用于照明。
天空里的光，特别当被飞行员看到的，也可以引起骚动，但它几乎总是被揭露为其他飞行器运行时的灯光，或者是气候研究用飞行器所放下的照明弹。
Lights in the sky, especially when viewed by pilots, can also cause a stir, but are almost always revealed to be running lights of other aircraft, or flares dropped by weather research craft.
应用推荐