Serrasoid
锯齿波(调制)
🗣️ 情景例句
Yes. It's the anniversary of one of our important revolutionary movements.
是的。它是中国一个重大革命运动的纪念日。
Make me a cup of coffee, will you?
给我冲杯咖啡，好吗？
Yet this is not always the case.
但情况却并不总是这样。