methyl blue

例句：

1. 1. The chemist used methyl blue to stain the sample.
   化学家用甲基蓝给样本染色。
2. 2. The doctor prescribed methyl blue for her allergy.
   医生给她开了甲基蓝来治疗过敏。
3. 3.The scientist discovered a new compound with methyl blue as its main component.
   科学家发现了一种含有甲基蓝为主要成分的新化合物。