we may learn from the passage that man-made barriers are some times harder to overcome than natural ones.请问这句怎么翻译?

We learn from history that we never learn from history. we should learn from lei from may 30th to sep 23th we plant trees in May.12th learn from history that we never learn from history. WWe learn from history that we never learn from history. we must learn from lei feng,_we? A may B can't C don't D needn't 还有：B:Well.We plan to stay there from May 7th to 1还有：B:Well.We plan to stay there from May 7th to 10th.A:All right.5.________B:Sure.My name is Bill Brown.A:Ok.We're waiting for your coming. what do we learn from the passage? We learn from ——（互相） whar can we learn from others we learn from ——互相 We should learn from these___(hero) what we can learn from scientist We have an English evening p________ on May 5th. We have an English evening (p ) on May 5th We learn from each other.变成同义句 We learn from —— —— what can we learn from john snow?what can we learn from john snow？