Pcg
abbr. Phonocardiogram 心音图; （心脏）声电图
🗣️ 情景例句
He knows all there is to know,
他无所不知，
No. It's not far at all.
不用。很近的。
It is used by travellers and business people all over the world.
在世界各地的旅行者及商人都用英语。