If you see the pictures of Mike, especially here well before he had his surgery at the time he was about 30 skiing downhill.

如果看了迈克的照片，特别是这张他接受手术前的照片,就在他接受手术的时候，即他大约30岁左右时，他还在从事高山滑雪。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

So this is a nice succinct way of recording what was in the previous two tables.

这样就把前两张表格的信息,更简明地表述出来了

耶鲁公开课 - 博弈论课程节选