Dust limits the amount of solar radiation that reaches the Earth, for example, a factor that could mask the warming effects of increasing atmospheric carbon dioxide.
灰尘限制了到达地表的太阳辐射数量，举例来说，会减缓因二氧化碳浓度增高而缠身滚的大气温室效应。
2
The possibility of post irradiation sarcoma after radiation therapy should not be a major factor influencing treatment decision in the patient with breast cancer.
由于放射治疗术后引发肉瘤之机率甚低，因此不应列入乳癌病人接受放射治疗与否之主要参考因素。
3
Ultraviolet radiation (UVR) is an essential risk factor for the development of premalignant skin lesions as well as of melanoma and non-melanoma skin cancer.