Ppbv
abbr. parts per billion by volume 十亿分体积比
🗣️ 情景例句
Sure, call me and we'll get together.
当然，给我打个电话，我们聚聚。
My sister is the oldest.
我的姐姐是最大。
It was over 30 feet in length and had a 2,500-horsepower engine.
它的车身长30英尺，有一个2，500 马力的发动机。