1. 不可预测：这已经被数学严格证明的例子所说明,某些被牛顿力学所描述的运动,实际上可能同掷骰子所得的结果是一样的,是随机(random)和不可预测(unpredictable)的.

2. 不可预知的：bare 裸露的,赤裸的 | unpredictable 不可预知的 | dictionary 字典

1. 无法预言的；不可预测的；难以预料的
    If you describe someone or something as unpredictable, you mean that you cannot tell what they are going to do or how they are going to behave.

    e.g. He is utterly unpredictable.
           他是个高深莫测的人。
    e.g. ...Britain's notoriously unpredictable weather.
           众所周知，英国的天气一向变幻莫测

adj

1. not occurring at expected times

    Synonym: irregular

2. unknown in advance

    e.g. an unpredictable (or indeterminable) future

3. not capable of being foretold