Prb
abbr. principal borehole 主钻井
🗣️ 情景例句
at this point in our lives?
在这个时候怎么样？
My brother wants to learn how to play the piano.
我的兄弟要去学弹钢琴。
It would be a waste of money to buy the IBM PC586.
买IBM586就浪费钱了。