Instead of this single value, a random variable has a function that describes the likelihood of values for the estimate and is called the variable's probability distribution.
取代单个值，随机变量拥有描述估计值可能性的函数，该函数称为变量的概率分布。
The Concat function will concatenate two or more strings from the source into a single string value on the target side.
Concat 函数将来自源的两个或多个字符串在目标端连接成一个单一的字符串值。
In Python, you obtain the value of these variables with a single call to the os.environ.get function as follows.
在Python中，通过对os . environ . get函数的一个调用来获取这些变量的值，具体如下。
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