n.增殖；繁殖；传播；传送
MS-medium can promote callus growing and propagation. MS培养基有利于愈伤组织生长增殖。
Rose propagation has a long and rich history. 玫瑰繁殖有着悠久的历史。
The phenomenon is called anomalous propagation. 这种现象被称为异常传播。
The sun sometimes spoils the propagation of radio waves. 太阳有时会影响无线电波的传播。
He discussed the propagation of waves through the earth's interior. 他探讨了地震波在地球内部的传播。
n.反向传播
