Ppmv
abbr. parts per million by volume 百万分体积比
🗣️ 情景例句
Ah. OK. That's a dollar and thirty cents change.
啊 ，好啦。这是一美元三毛零钱。
To hiss
咻咻地叫
Yes, it was. But it's much colder today.
是的，昨天冷。但是今天更冷。