Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
What do you suppose he wanted?
你认为他想要什么？
My brother wants to learn how to sail a boat.
我的兄弟要去学操纵帆船。
Don't let chances pass by.
不要让机遇从我们身边溜走。