Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
What time is it?
现在是什么时间了？
Could you take a picture for me?
你能帮我拍照吗？
Some things are collected deliberately in the home in an attempt to avoid waste.
居家度日，有目的地收藏某些东西是为了防止浪费。