摘要
本文介绍了革兰氏染色三步法、四步法的材料、配制以及染色过程，并进行了比较与分析。
The artick introduces material.compound and process of three-step method and four-step method of Gram stain,And it explains the similarities and differences between the two methods.
关键词
革兰氏染色
三步法
四步法
Gram stain
Three-step method
Four-step method
