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
Oh, it's not finished yet,
噢！它尚未完成。
The joy of the heart makes the face merry.
喜形于色。
Von Frisch watched the wagging dance very carefully.
冯·弗里施非常仔细地观察蜜蜂跳的摇摆舞。