Arc secant
反正割
🧩 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;
a. 正割的\\nn. 割线, 正割
🗣️ 情景例句
He was ill at ease with people whom he didn't understand.
他和不熟悉的人在一起感到不自在。
Do flying saucers really exist?
飞碟真的存在吗？
But some people don't want good farmland to be built on.
但有些人不愿意把好的农田用来建造厂房。