None of us have seen a case of smallpox, it hasn't existed in the world for many decades now.

我们没人见过天花,在这个世界上它已经被消灭几十年了

耶鲁公开课 - 生物医学工程探索课程节选

I guess you've already looked at Stocks for the Long Run; you've seen 200 years worth of data.

我想你们已经读过《股市长线法宝》,见过长达200年的数据

耶鲁公开课 - 金融市场课程节选

He also mentioned a poemby Rudyard Kipling called If. I didn't recognize what he was referring to immediately but I looked it up and it's a famous poem that you must have seen written in 1910 an inspirational poem.

他同时也提到了拉迪亚德？吉卜林的一首诗歌,名字叫做《如果》，我当时并没有迅速反应出,他到底指的是哪首诗，但是之后我查了一下发现,它是一首你肯定见过的著名的诗歌,写于1910年，一首启发性的诗。

耶鲁公开课 - 金融市场课程节选