Cosec
n. 余割
📖 牛津释义
cosec
abbr
缩写 = cosecant.
🗣️ 情景例句
Look, who's here, Peter!
看，这是谁，彼得！
Hunger will relish the plainest fare.
饥不择食。
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。