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
Leave me alone.
让我一个人呆会儿。
A man of words and not of deeds is like a garden full of weeds.
一个只说不做人就像一个长满野草的花园。
He opened it and saw the man from downstairs.
他打开门，看见楼下人。