Midperpendicular
舯垂线
🗣️ 情景例句
When you're ready to get off, remember to press the button near your seat.
当你要下车时，记得按你座位旁的按钮。
Take care of the pence, and the pounds will take care of themselves.
积少自然成多。
The doctor began to operate on the boy.
医生开始给那个男孩动手术。