电蚊蝇纱窗利用蚊蝇趋光的 习性，在白天也能杀灭室内的蚊蝇。
Taking advantage of phototaxis of insects, the electric fly-flap can even kill mosquitoes and flies even in day time.
太阳活动的周期是11年。新数据表明，在一个周期末期太阳活动趋弱时，抵达地球的光与热的量增加而不是减少了。
As solar activity waned at the end of one of the Sun's 11-year cycles, the new data shows the amount of light and heat reaching the Earth rose rather than fell.
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