Arctangent
反正切
🗣️ 情景例句
I guess we were thinking the same thought.
我想我们的心意相同。
Accidents will happen in the best regulated families.
即使家规严，丑事总难免。
Yes, said Miss Yang.they're on that shelf over there.
“有，”杨小姐说，“就在那边的那个书架上。”