Untraceable
a. 难追踪的, 难以发现的, 难以描绘的, 难以摹写的
🗣️ 情景例句
What's the tuition for one year of college?
大学一年的学费是多少？
Please send us all the data concerning your Hero Brand fountain pens and ball pens, so we can introduce your products to our customers.
请寄给我们有关你方英雄牌自来水笔和圆球笔的资料，以便我们向顾客介绍你们的产品。
You had it when I last saw you.
我上次见你时你还有的。