Arctan
反正切
🗣️ 情景例句
Turn around, Michelle. Let me see the back of it.
转过去一下， Michelle。让我看看它的背面。
It drives me crazy.
它使我快要发疯了。
That was quick! she said. Have you finished already?
“你真快！”她说，“你已经买完东西了吗？”