Ppb
[化] 十亿分率
🗣️ 情景例句
You look as fit as a fiddle.
你看起来非常健康。
Yes, I have got the license from the Bank of China. Here you are.
是的，我已得到中国银行的许可。请过目。
Scientists discovered that this particular variety of rabbit (and apparently no other animal)
科学家们发现，这种特殊品种的兔子（显然不包括别的动物）