Totient
欧拉φ函数
🗣️ 情景例句
You and Mommy used to take me on the ferryboat.
你和妈妈常带我坐渡船。
Great souls suffer in silence.
伟人受苦，声色不露。
demons, knights, kings, warriors, mermaids, cherubs;
妖魔、骑士、国王、武士、美人鱼和小天使，