Cassinoid
卡西尼卵形线
🗣️ 情景例句
No advertising material.
谢绝广告。
Why was only he exempted from work?
为什么只有他不必工作呢？
Since its discovery, it has become a sort of potholers' Everest.
自从被发现以后，这个洞成了洞穴探险者的珠穆朗玛峰，