Ppm.
[医] 兆比率(百万分之几)
🗣️ 情景例句
Well, I'll try to arrange the schedule, Dr. Stewart.
好吧，尽力去安排，Stewart大夫。
Let me lend it to you.
让我借给你。
Hi! Nice to meet you, Ling Feng!
很高兴见到你，。