Minorante
劣函数
🗣️ 情景例句
Everything is shaping up well.
一切进展顺利。
A joke never gains an enemy but often loses a friend.
开玩笑总不能化敌为友，反而有时会失去朋友。
Jim, where's your father?
吉姆，你爸爸在哪儿？