Hi, everybody.This weekend, our hearts are with the people of San Bernardino—another American community shattered by unspeakable violence.We salute the first responders—the police, the SWAT teams, the
We Are What We Choose 选择塑造人生——杰夫·贝索斯 Cleverness is a gift, kindness is a choice. Gifts are easy — they're given after all. Choices can be hard. You can seduce yourself with your gifts if you'r
Okay, now I don't want to alarm anybody in this room, but it's just come to my attention that the person to your right is a liar. 我不想吓唬你们，但是我发现坐在你右边的那个人是个骗子。 Also, the person to your left is a liar. 坐
Does anybody know when the stethoscope was invented? Any guesses? 1816. 有人知道听诊器是什么时候发明的吗？大家试着猜一猜，有人说是1816年。 And what I can say is, in 2016, doctors aren't going to be walking around with stethoscopes.
