subatomic

a. 亚原子的(次原子的,原子内的,比原子更小的)

Small as they are, atom is made up of still smaller unit know as subatomic particle.

原子虽小，但它们是由更小的称为亚原子粒的单位组成的。

Decaying with relatively short lifetime. Used of subatomic particles.

衰变的具有相对较短的寿命而衰变，常用于亚原子粒子