精神兴奋剂

A derivative of amphetamine, such as dextroamphetamine or a phosphate or sulfate of amphetamine, used as a central nervous system stimulant in the treatment of certain conditions, such as narcolepsy and depression.

硫酸苯丙胺安非他命的衍生物，如右旋安非他命，或其磷酸盐或硫酸盐，在治疗某种病状如发作性睡病和精神抑郁时可用作中枢神经系统兴奋剂

The most frequently used psychoactive substance by students in Maiduguri is caffeine, a Stimulant, which they use to enhance there study.

迈杜古里学生最常用的精神活性物质是咖啡因，一种兴奋剂，学生用来帮助学习。

I think he's learned how to approach hitters....

Johhny Damon说，『他已是最好的了，再没有人能够比他做的更好，我想他的球技已经完全成熟了，而且他也已经学会了如何去对付和压迫各种打击者。。。。。。

In effect, an 18 foot King Cobra could actually look down onto the average human being.

际上，一个18尺眼镜蛇王其实可以俯视到的平均人。