Unknowns
n. 未知事件（unknown的复数）
🗣️ 情景例句
Hello, my name is ... May I speak to ...?
喂， 我叫……我可以和……讲话吗？
The beginnings of all things are small.
万事开头小。
My particular experience is largely in oil,
我是专门搞石油的，