Arctan
反正切
🗣️ 情景例句
Fine, Mr. Wrigley.
好的，威格雷先生。
Don't criticize him for his delay.
不要责备他的延误。
In 1975, a primitive machine called the Altair, was launched in the USA.
1975年，美国推出了一台被称为“牛郎星”的原始机型。