Arc cosecant
反余割
🧩 词语组成解析
arc
[ɑ:k]
n. 综合症状;弧（度）;天穹;电弧，弧光。;
vi. 形成拱状物;循弧线行进;
abbr. American Red Cross. 美国红十字会;
n. 余割\\n[电] 余割
🗣️ 情景例句
It was so exciting to meet her again after so many years.
多年以后和她再相遇是多么让人激动啊!
Silent men, like still waters, are deep and dangerous.
沈默的人像静水一样，深而难测。
How late do you plan to be?
你们预计延迟多久？