adj.青春期的；孩子氣的；未成熟的

He was trying to give puerile excuses. 他給出的借口總是愚蠢至極。

She was tired of answering these puerile questions. 她回答這些幼稚的問題覺得不勝其煩.

John made mincemeat of all her arguments, and said that he had never heard anything so puerile before. 約翰把她的論點(diǎn)駁得體無完膚，并說他從來沒有聽過這樣幼稚可笑的道理。