r开头的单词名词

　　Workers at the nuclear plant were exposed to high doses of radiation.

　　核电站的工作人员受到大量辐射。

　　Ozone is the earth's barrier against ultra-violet radiation.

　　臭氧是地球防止紫外线辐射的屏障。

　　His treatment was a combination of surgery, radiation and drugs.

　　对他的'治疗是把手术、放射和药物治疗结合为一体。

　　The sun's radiation penetrates the skin.

　　太阳的辐射能透进皮肤。

　　The satellite will study energy radiation from stars.

　　这颗人造卫星将用来研究恒星的能量辐射。