The Terra and Aqua satellites carry instruments called spectroradiometers which detect the infrared radiation, that is, the heat, radiating from the Earth's surface.

Terra 和 Aqua 卫星携带着名为 “分光辐射度计” 的仪器，它测量的是红外线辐射，也就是地球表面辐射的能量。

At the same time, it traps the infrared radiation — aka heat —radiating out from Earth's sun-warmed surface, keeping us from freezing solid at night.

同时，它捕获了从地球上被太阳热表面发出的红外辐射——也就是热量，使我们在晚上不至于冻成冰块。

At the same time, it traps the infrared radiation – aka heat – radiating out from Earth’s sun-warmed surface, keeping us from freezing solid at night.

同时，它捕获红外辐射——也就是热量——从地球被太阳加热的表面辐射出去， 使我们在夜间不会冻僵。