a form of energy that comes from a nuclear reaction and that can be very dangerous to health
发音
例句
1. The sun, a lamp, or an electric heater all warm us by radiation. 太阳、灯或电热器都可以通过辐射来温暖我们。 2. Sunlight consists of different wavelengths of radiation. 阳光由几种不同波长的射线组成。