Cosec
n. 余割
📖 牛津释义
cosec
abbr
缩写 = cosecant.
🗣️ 情景例句
You don't know what you are talking about.
你不知道你在说什么。
The fire is the test of gold; adversity of strong man.
烈火试真金，困苦练壮士。
I'm single.
我是单身贵族。