naive
adj. 天真的，幼稚的；（艺术风格）朴素的，原始的；缺乏阅历的，轻信他人的
例句
Their approach to life is refreshingly naive.
他们对待生活的态度天真率直，令人耳目一新。
《牛津词典》
Their view was that he had been politically naive.
他们的看法是，他在政治上曾是幼稚的。
《柯林斯英汉双解大词典》
I can't believe you were so naive as to trust him!
真是难以相信你会幼稚到信任他！
