Devoicing
v. 使清音化；浊音清化（devoice的ing形式）
🗣️ 情景例句
The policemen could not cope with the crowds.
警察不能对付群众。
Many great men have arisen from humble beginnings.
有许多伟人出身卑微。
What was the population of the world in 1950?
1950年世界人口是多少？