Pushdown
推下; 后进先出方式
🗣️ 情景例句
Who has torn these pages out of the book?
谁撕掉书上的这几页？
Mrs.Smith, I'd like to introduce a friend of mine, Pierre Dubois.
史密斯太太，我来介绍一下我的朋友皮埃尔=杜布斯。
A young English writer made the pertinent observation a year or two back
一两年前，一位年轻的英国作家发表了中肯的看法。