1. (药物等的)一剂，一服
    A dose of medicine or a drug is a measured amount of it which is intended to be taken at one time.

    e.g. One dose of penicillin can wipe out the infection.
           一剂青霉素就能消除感染。

2. (尤指数量很多的)一份，一次，一点
    You can refer to an amount of something as a dose of that thing, especially when you want to emphasize that there is a great deal of it.

dose是什么意思

    e.g. She was born with a healthy dose of self-confidence...
           她天生就充满自信。
    e.g. The West is getting a heavy dose of snow and rain today.
           西部今天将迎来一场大的雨夹雪。

3. 给…服药
    If you dose a person or animal with medicine, you give them an amount of it.

    e.g. The doctor fixed the rib, dosed him heavily with drugs, and said he would probably get better...
           医生接好了肋骨，给他服用了大剂量的药，并说他可能会有所好转。
    e.g. I dosed myself with quinine.
           我服用了奎宁。