The population mean is often written "x-bar." If you have a sample with n observations, it's the summation i = 1 to n of xi/n--that's the average.

人口均值经常写成“x-条形柱”，如果你有一个样本有n个观测者，是从 i=1到n和的xi/n，这是平均值。

youdao

N is for never be mean - If the person means something to you, never be mean, never belittle - it can be damaging to the other person's sense of self worth.

不要刻薄—如果对方对你很重要，就不要刻薄和贬低，它会损害对方的自尊。

youdao

The new H and N surface proteins mean most people do not have antibodies to the virus, allowing it to go pandemic.

新H 和N表面蛋白这意味着多数人对这病毒没有抗体，使其得以流行。

youdao

It turns out there's a new function strlen S-T-R-L-E-N that you probably have not used yet called strlen, S-T-R-L-E-N, programmers early on and still like to be succinct but communicates sufficiently what they mean.

结果这里有个新的函数,你可能没有使用过，叫做，早期的和现在的程序员喜欢简洁地,但是能充分的传达他们的意思。

哈佛公开课 - 计算机科学课程节选

This should make sense to you, because they don't, in fact, want to gain another electron, because that would mean that electron would have to go into a new value of n, a new shell, and that's really going to increase the energy of the system.

这对大家来说应该容易理解，因为它们实际上不想得到另一个电子，因为这意味着这个电子不得不,到一个新的，n，值更大的壳层上去，这将会增加系统的能量。

麻省理工公开课 - 化学原理课程节选

The mean proportion-- The mean of x/n, is equal to p.

事件发生频率的均值,即x/n的均值,就等于p

耶鲁公开课 - 金融市场课程节选

What exactly does U.N. approval mean?

CENTERFORSECURITYPOLICY: Center For Security Policy

It cannot mean the U.N.

CENTERFORSECURITYPOLICY: Center for Security Policy | The Case Against Saddam (IV): What International Community��?

And Austin Fragomen(ph), a U.S. Immigration lawyer who will take part in the U.N. meeting, says plummeting birth rates in the West mean labor shortages for decades to come.

NPR: U.N. Puts Spotlight on Global Immigration