Autoregulator
自动调节器
🗣️ 情景例句
if it's all right with your dad.
假如你爸爸答应的话。
When three know it, all know it.
三人知，天下晓。
They carved a whole page of characters back-to-front in the wood.
他们在木板上刻满整页的反字（背面朝上）。