英语语法分析

He had in fact intentionally used crystal methylene.

事实上，他曾刻意服用晶体甲基。

And effective drug for the treatment of methylene blue pigment class.

有效治疗药为色素类的亚甲基蓝。

Do partial water changes. Add 2-5 drops per gallon of Methylene Blue.

局部换水。添加亚甲基蓝，每加仑水添加2 - 5滴。