Nacked
(nack 的过去分词) abbr. 否定应答（Negative Acknowledgement）
🗣️ 情景例句
When you go to a new school it takes a while to know the ropes.
到一所学校读书要花一段时间熟悉情况。
Jeff was not pleased with his school grades.
杰夫不满意自己在学校的成绩。
One of links in the chain that drives the wheels had snapped.
驱动轮子的链条断了一节。