你要知道：不动声色的强大是人生的一堂必修课！（225句）

任何事情尽力就好！每次直播开课的第一天都是我最紧张的时候，都会有各种各样的不顺利，但这次的五夜十篇是我这几年来最顺利的一次。节奏也好，内容也好，我都觉得刚刚好！你们的状态也让我很感动，能坚持连续听3个小时，真的不容易！再次感谢同时在线的万名同学，我们都尽力就好！今天的句子：     Men have a long history of fighting with one another for dominance, but why such duels did not leave tribal unity in tatters and warriors less capable of working together to fend off attacks from predators and hostile clans remains a mystery. One common theory is that men more readily make up after fierce physical conflicts than do women. And an experiment run recently at Harvard University, by Joyce Benenson and Richard Wrangham, and published in Current Biology, sugges ………………………………