Concentricity
n. 同中心
🗣️ 情景例句
OK. But don't delay too long. Or that trip will be all booked.
好，但不要拖太久，否则会订满的。
This is Lesson One.
这是第一课。
Thanks.The same to you. Bye.
谢谢。也祝你旅途愉快！