But we can determine what that constant is, because we know that if we sum over all the possible states, the molecule has to be in some state, right?
我们可以确定这个常数，因为我们知道，当我们把所有的态加起来之后，粒子必定处于某个状态，对吗？
In general we would sum over all the available states.
通常对所有可以允许的态进行求和。
And it's just a sum over our available states with their associated Boltzmann factors.
它就是所有可能状态的求和，对包含相应的玻尔兹曼系数的。
But we doing a sum over the individual molecular states.
在这里我们是对分子状态的求和。
And we've got a sum over our energies for all the states.
要对所有的态的能量进行求和。
And we're just going to sum over the states.
我们将要把所有态加起来。
So we're going to sum over these states.
对这些状态求和。
The partition function, also called the sum over states, It plays an important role in the evaluation of thermodynamic functions and in the derivation of distribution functions.
配分函数，也称状态和函数。对于热力学函数的获得及在分布函数的导出中拌演着重要角色。
The United States, which spent up to $1.1 billion a year on "Plan Colombia" a decade ago, has disbursed to Central America little more than a tenth of that sum over each of the past three years.
美国在十年前曾一年斥资十一亿美元用于「哥伦比亚计画」，但过去三年每年支付中美洲的数字仅略多于该金额的十分之一。
The United States, which spent up to $1.1 billion a year on "Plan Colombia" a decade ago, has disbursed to Central America little more than a tenth of that sum over each of the past three years.
美国在十年前曾一年斥资十一亿美元用于「哥伦比亚计画」，但过去三年每年支付中美洲的数字仅略多于该金额的十分之一。
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