详细解释:【化】 常量法
英语解释：
名词 gram method:
a staining technique used to classify bacteria; bacteria are stained with gentian violet and then treated with Gram's solution; after being decolorized with alcohol and treated with safranine and washed in water, those that retain the gentian violet are Gram-positive and those that do not retain it are Gram-negative同义词：Gram's method, Gram's procedure, Gram's stain, Gram stain