Nacks
(nack 的第三人称 -s形式) abbr. 否定应答（Negative Acknowledgement）
🗣️ 情景例句
But now I'm living in the Bronx.
但现在我住在Bronx区。
If he doesn't take care of him, I will.
如果他不，我将照顾他。
Such creatures have rarely been seen alive by man as they live at a depth of six hundred feet.
人们很少能看到活着的这类动物，因为它们生活在600英尺深的水下。