Concentricity
n. 同中心
🗣️ 情景例句
What's the difference? No one will ever find out.
有什么两样？没有人会发现。
Devil must be driven out with devils.
以毒攻毒。
This is because the surface of the earth is not flat but round.
因为地球表面不是平的，而是圆的。