Peritrochoid
外摆线圆
🗣️ 情景例句
Go by the book.
照章办事。
This is a chair.
这是一张椅子。
When he returns home at night, he always finds that someone has parked a car outside his gate.
当他夜里回到家时，总是发现有人把车停在他家大门外。