Ppb
[化] 十亿分率
🗣️ 情景例句
She's a bimbo.
她行为放荡。
They say there's a traffic accident in front of us.
据说在我们前方发生了车祸。
With great difficulty, he climbed into the shop window to get the dress.
费了好大劲儿，他爬进橱窗去取那件衣服。