常見例句雙語例句Any of three processes of radioactive disintegration in which a beta particle is spontaneously emitted by an unstable atomic nucleus in order to dissipate excess energy.某些不穩(wěn)定原子核爲(wèi)耗散其過賸能量而自發(fā)發(fā)射一個(gè)β粒子的三種放射性衰變過程的統(tǒng)稱。 返回 beta disintegration