Nacks
(nack 的第三人称 -s形式) abbr. 否定应答（Negative Acknowledgement）
🗣️ 情景例句
I'd like to check this book out.
我想借这本书。
No, I only wrote her one letter this year.
是的，今年我才给她写过一封信。
As the parents had five children, life was a perpetual struggle against poverty.
家里已有5个孩子，全家人常年在贫困中挣扎。