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ra·di·a·tion·al cool·ing AHD[rā'dē-āʹshə-nəl ko͞o′lĭng] D.J.[ˌreɪdiːˈeɪʃənəl ˈkuːlɪŋ]K.K.[ˌrediˈeʃənəl ˈkulɪŋ]n.（名词）- The cooling of the earth's surface and the air near the surface, occurring chiefly at night and caused by heat loss engendered by terrestrial radiation.辐射冷却：主要发生在夜晚的地面或近地面空气的冷却，由地面辐射造成的热量丧失引起
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