America has no permanent friends or enemies, only interests.
如果你愿意,我们可以回到那个山洞。
"if you think tough men are dangerous, wait until you see what weak men are capable of.
"The world is a book, and those who do not travel read only one page."
译文:与人说话,都是在为自己积德,和妻子和孩子相处也就是修身养性。赏析:会说话的人懂得如何说话,从而不会得罪人,自然就是积德。反之,那些口无遮拦之人,处处在伤害他人,处处在树敌,其结果会给自己带去祸害的。
统计学领域研究的是如何在不确定性面前做出决策。