A white, crystalline synthetic compound, C9H8N2O2, used as a mild stimulant of the central nervous system, usually in combination with magnesium hydroxide, especially in treating depression.是什么意思_A white, crystalline synthetic compound, C9H8N2O2, used as a mild stimulant of the central nervous system, usually in combination with magnesium hydroxide, especially in treating depression.在线翻译_英语_读音_用法_例句