TounderstandwhytheEa的精選

問題詳情：TounderstandwhytheEarthiswarmingup,firstofall,weneedtounderstandwhyitiswarm.Ourplanetiscoveredwithatmosphere(大氣)ightpassesthroughtheatmosphereandreachestheEarth.TheSunheatsuptheEarth'ssurfa...