在过去的22年当中，伯克希尔·哈撒韦股价有15年表现好于标普500指数。

Overall, it beat the index in 15 of the last 22 years.

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今天标普500指数下跌幅度抹去了当月累计的上涨幅度。

Today’s equity slump erased the month-to-date gain in the S&P 500.

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汤姆森-路透公司**发布的标普500指数的远期四季P/E值只有12.7。

The forward four-quarter P/E ratio for the S&P 500, according to Thomson Reuters, is just 12.7.

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And this spin magnetic quantum number we abbreviate as m sub s, so that's to differentiate from m sub l.

这个自旋磁量子数我们把它简写成ｍ下标ｓ,以和ｍ小标ｌ有所区分。

麻省理工公开课 - 化学原理课程节选

So there's two different orbitals that can have these three quantum numbers, but if we're talking about electrons, we can also talk about m sub s, so if we have two orbitals, how many electrons can we have total?

所以有两个轨道可以有,这三个量子数，但如果我们讲的是电子，我们还要考虑ｍ小标ｓ,如果我们有两个轨道，一共有多少个电子呢？

麻省理工公开课 - 化学原理课程节选

m And the third one is called m, l it's also m sub l.

第三个量子数叫做，也叫做m小标。

麻省理工公开课 - 化学原理课程节选