propagation
英 [,pr?p?'ɡe???n]
美[,prɑp?'ge??n]
- n. 傳播；繁殖；增殖
英英釋意
- 1. the spreading of something (a belief or practice) into new regions
- 2. the act of producing offspring or multiplying by such production
- 3. the movement of a wave through a medium