Cosec
n. 余割
📖 牛津释义
cosec
abbr
缩写 = cosecant.
🗣️ 情景例句
Richard is right.
Richard是对的。
Say not all that you know, believe not all that you hear.
莫道全所知，莫信全所闻。
Excuse me!
打扰一下。