Look again at the sentence that I just read, the last lines: Soon had his crew Op'nd into the Hill a spacious wound And dig'd out ribs of Gold."

再看一下我刚刚读过的句子，在最后几行：,不久，他带去的人马,凿开了那座山，画出一条很大的伤口,挖出黄金的肋条“

耶鲁公开课 - 弥尔顿课程节选

You put a child on one side of the mountains and you ask him to draw it, and a four- or five-year-old can do it easily, but then you ask him to draw it as it would appear from the other side and children find this extraordinarily difficult.

你让孩子在模型的一边,要求他把自己看到的三山模型画出来,四五岁的儿童便能够轻易做到,但是,如果你要求儿童画出,从模型另一边看过去的样子,儿童就会觉得非常困难

耶鲁公开课 - 心理学导论课程节选