英汉词典

1. 任意的；随机的；偶然的
    A random sample or method is one in which all the people or things involved have an equal chance of being chosen.

random的意思

    e.g. The survey used a random sample of two thousand people across England and Wales...
           该调查在英格兰和威尔士随机抽样了2,000人。
    e.g. The competitors will be subject to random drug testing.
           参赛者将要接受随机药检。