Nacks
(nack 的第三人称 -s形式) abbr. 否定应答（Negative Acknowledgement）
🗣️ 情景例句
It only takes eight minutes by bicycle to the aerobics class.
骑自行车去上有氧运动课只需要八分钟。
It's the year of 1999.
今年是1999年。
is as the proportion of the total vocabulary of his mother tongue against those words of his own baby talk that are taken up into the vernacular of his family.
就好像他本国语言的总词汇量和自己咿呀学语时他家庭所接纳的他的词汇量之比。