Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
Oh, so you don't need something immediately?
呵， 所以你们 ，不是急着马上就要？
New year's Eve comes one week after Christmas.
新年夜在圣诞节的一周后到来。
His words are strongly impressed on my memory.
他的话深深地铭记在我的心头。