Ppr
abbr. 现在分词（present participle）
🗣️ 情景例句
The news was announced to the public on TV.
这则消息经由电视向大众宣布。
He should meditate on the problem.
他必须就那个问题好好地想一想。
The survey revealed a large number of sources of noise that we really dislike.
这个调查显示出很大数目我们不喜欢的噪音源：