Devoicing
v. 使清音化；浊音清化（devoice的ing形式）
🗣️ 情景例句
There are abundant free materials available on the internet.
因特网上有丰富的免费资料提供。
What is the number?
号码是多少？
When the brothers were reunited, Hans explained how it was that he was still alive.
兄弟俩团聚之时，汉斯说明了他活下来的经过，