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
Something old.
旧的东西。
Why are you standing behind the door?
你为什么站在门后？
The Maori have insisted on keeping their own customs and way of life.
毛利人一直坚持保留他们自己的风俗习惯与生活方式。