(a) (the sending out of) heat, energy, etc in the form of rays （热、能等的）放射; 辐射的热、能等
*a combination of radiation and convection, eg in a gas fire 辐射和对流的结合（如在煤气炉中）.
(b) (the sending out of) rays and atomic particles from radioactive substances （自放射性物质中放射出的）射线和原子粒子; 放射; 放射现象
*a low/high level of radiation 低[高]强度辐射
* [attrib 作定语] Some cancers are treated by radiation therapy. 有些癌症可用放射疗法治疗.
2 [C] thing that is radiated, esp radioactive particles 放射物; （尤指）放射性微粒, 放射线
*radiations emitted by an X-ray machine X射线机放射出来的放射线.
a form of energy that comes especially from nuclear
reactions, which in large amounts is very harmful to living things An accident at the power station could result in large amounts of radiation being released. a lethal dose of radiation
energy in the form of heat or light that is sent out as waves that you cannot see Sun creams work by blocking harmful ultraviolet radiation.
1. Earlier this month, Alberto Torres's wife, who had just been laid off from her job, had to have a breast removed due to cancer and now faces a year of radiation treatments. 这个月初，阿尔伯图·多里斯刚刚失业的妻子，由于患癌症而不得不将一侧乳房切除，而今又面临一年的放射性治疗。
2. The radioactive material is stored in a special radiation-proof container. 放射性材料贮存在防辐射的特殊容器内.
3. No medicine worked, since the only known treatment for radiation sickness was rest. 这病无药可治，因为治疗辐射病的惟一办法就是休息。
4. A metal called uranium gave off a kind of radiation. 一种叫铀的金属会发出一种射线。
5. As the others were recovering, Kaz fell ill with all the symptoms of radiation sickness. 当家里其他人都在康复时，和子却病倒了，辐射病的症状全出现了。