Totient
欧拉φ函数
🗣️ 情景例句
What's your problem, Mike?
你现在问题在哪 ，Mike？
which direction is it to the theatre?
它哪个方向对剧院？
Thank you,Jim. Please sit down. Could you count them, please, Lucy?
谢谢你吉姆， 坐下吧！你能数数吗？鲁茜？