Nack
abbr. 否定应答（Negative Acknowledgement）
🗣️ 情景例句
Keep out of what doesn't concern you.
不关你的事不要插手。
What's the suggested retail price?
建议零售价格是多少呢？
Last November it was Class 3's turn.
去年11月，轮到3班去参观了。