You are asked to dip the car's headlights when you meet another car at night.
夜间开车遇到交会车辆时应该减弱前灯亮度。
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A fascinating thing about Earth, which may make it unique, is that all through its very long existence, all four and a half billion years, variations in the luminosity of the Sun have been compensated for by a variable greenhouse effect.
地球有一件迷人的事情,这可能使它
一无二,那就是
它漫长的存
过程中,
45亿年的时
里,太阳亮度的变化被可变的温室效应抵消了。