染色劑的用法和樣例：
例句
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對比染色劑，對照染色劑一種對比顏色的染色劑，用來(lái)染制主染色劑染后顯不出的顯微術(shù)標本成分
A stain of a contrasting color used to color the components in a microscopic specimen that are not made visible by the principal stain. -
焦寧；二苯氧芑膠染料用作生物染色劑的一組紅色染料中的任一種，尤指用來(lái)探測核糖核酸的存在
Any of a group of red dyes used as a biological stain, especially to detect the presence of RNA.
