Biellipticity
双椭圆率
🗣️ 情景例句
Thank you, Somsak.
谢谢你， Somsak。
The hungry belly has no ears.
饥寒起盗心。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。