Ppbv
abbr. parts per billion by volume 十亿分体积比
🗣️ 情景例句
Time heals all sorrows.
时间会治愈一切悲哀的。
Do you have nay objection to the stipulations about the packing and shipping marks?
有关包装运输唛头的条款你们有什么异议吗？
But to tell you the truth.you need a new car!
不过说实在的，您需要一辆新车了。