Reduce函数对发出的特定单词计数求和。

The Reduce function sums together all counts emitted for a particular word.

youdao

至于定义嘛，实际上，就是把区域分割成许多小区域，再把一点的函数值乘以那个小区域的面积，然后对乘积求和。

And the definition, actually, is we split the region into lots of tiny little pieces, we multiply the value of a function at the point times the area of a little piece and we sum that everywhere.

youdao

这个求和叫做配分函数。

Just these sums, what are called partition functions.

youdao