Ppbv
abbr. parts per billion by volume 十亿分体积比
🗣️ 情景例句
I'm so hungry, I could eat a horse.
我饿得能吃下一匹马！
My overcoat is red.
我的大衣是红色的。
OK, said Jim. We can have some for our picnic lunch.
“好，”吉姆说，“我们午餐可以吃点香蕉。”