Ppg
abbr. 聚丙二醇；脉冲程序发生器（ programme pulse generator）；每加仑脉冲数（Pulses Per Gallon）；聚醚
🗣️ 情景例句
In Thailand we greet strangers as long lost friends.
在泰国我们跟陌生人像失去联络好久的老朋友一样打招呼。
May I go out?
我能出去吗？
After he had put it on the floor, he promptly went to sleep again.
他把床垫往地板上一放，很快又睡着了。