The basic clue and the main steps of renormalization group method used for the description of critical phenomena is introduced. 摘要介绍了用重整化群方法描述临界现象的基本思路和做法。
The renormalization group is therefore like a microscope with a magnification that can be turned up or down to examine a process at finer or coarser detail. 因此重整化群就好像显微镜，其放大倍率可以调大或调小，以研究各种尺度下的物理过程。
