The Earth’s surface emits infrared radiation it has absorbed from the sun. Greenhouse gases partly trap that energy as heat, keeping the planet habitable.
Greenhouse gases absorb this infrared radiation and trap the heat in the atmosphere.
温室气体吸收红外辐射的热量，并且把这个热量保存在大气层中。
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They are to utilize light radiation pressure to trap and manipulate micro-particles including dielectric spheres, cells and biological macro-molecules.