In fact this was a standard means for microbiologist to identify bacteria based on how much cyanide they could tolerate.

事实上，这是微生物学家根据细菌可耐受的氰化物鉴定细菌的标准方法。

It also means standard or common.

它还表示标准或通用。

We use the term " par for the course" simply to mean standard, normal, usual.

我们使用术语“par for the course”来简单地表示标准、正常、通常。

High national income can mean high living standards – high levels of wealth for people.

高国民收入可能意味着高生活水平——人们的高财富水平。

So it's the standard deviation of the distribution of the mean of x1 minus the sample mean of x2.

所以它是 x1 的均值分布的标准差减去 x2 的样本均值。

STP means standard temperature and pressure, which according to the lords of chemistry is 0 degrees Celsius and 100,000 pascals or 100 kilopascals.

这个 STP 的意思是——标准温度和压力（简称为标准状况），在化学里它的意思是摄氏0度 和 10万帕斯卡 (或者说100千帕斯卡)。

All of these things I just mentioned, these all just mean the standard deviation of the sampling distribution of the sample mean.

我刚才提到的所有这些东西，这些都只是意味着样本均值的抽样分布的标准偏差。