【化】 二次电子

当初始电子碰撞绝缘壁时，会产生二次电子，而二次电子能改善电子在通道出口处的电子能量分布的均匀性。

secondary controller

secondary hyperparathyroidism

by-pass accumulator【电】;secondary cell【电】

secondary thickening

secondaryorder conditioned stimulus

secondary reaction

secondary memory

secondary air (supplementary air) detoxication of exhaust gases