There are stories, horrible stories, some in the twentieth century, about children who are locked away by insane or evil parents and have never learned to speak.

有一些很可怕的故事,其中的一些讲述的是在二十世纪里,被精神失常或邪恶的父母锁起来的儿童,他们不曾学会说话

耶鲁公开课 - 心理学导论课程节选

And they themselves never learn to speak.

他们也不曾学会说话

耶鲁公开课 - 心理学导论课程节选