Ppb
[化] 十亿分率
🗣️ 情景例句
I'm not quite familiar with the claim and arbitration in international trade.
我对国际贸易的索赔与仲裁不够熟悉。
Would you care to answer my question on the warranty?
你可以回答我有关保证的问题吗？
In cities he refused to travel in a rickshaw, a two-wheeled cart pulled by a bare-footed man.
在城里，他拒绝乘坐那种赤脚车夫拉的两轮人力车。