To be Irish is to know that in the end the world will break your heart.
解释:人有知识,犹如树木有枝叶,树木有了枝叶,能带给人阴凉,人有了知识,就可以为人民做更多的事。
历史的地理枢纽是世界上距离海洋最远、因此最不受海权影响的地区。
Mathematics is the language in which the gods talk to people.