Nack
abbr. 否定应答（Negative Acknowledgement）
🗣️ 情景例句
Bye, Marilyn. Hope to see you again.
再见 Marilyn。希望能再看到 。
What was that?
你说什么来着？
as by falling into inaccessible caves, or into an ice crevasse, like the Siberian mammoths,
如掉进难以到达的洞穴，或掉进冰河裂缝里，或者像西伯利亚长毛象那样掉进冰窟中，