难以想象的巨大恒星间或爆炸，向四面八方发射着一股股放射性气流，力量如此强大，以至任何附近的行星天体都在瞬间化为灰烬。

Stars of unimaginable proportions on occasion explode, sending a blast of radiation in all directions that is so powerful, any nearby planetary bodies are incinerated within seconds.

youdao

氡子核在衰变时发射出放射性阿尔法粒子，这些粒子可附着于空气中的浮质、灰尘及其它粒子。

As radon progeny decay, they emit radioactive alpha particles and attach to aerosols, dust and other particles in the air.

youdao

放射光：一个像炽热的物体那样发射光线的对象。

Emissive light: an object can send out light to imitate glowing objects.

youdao