概率论第一个基本原理中的一条是事件的独立性。
One of the first principles of probability is the idea of independence.
小概率事件原理是概率论中的一个基本又具有实用意义的原理，在这一原理分析的基础上通过几个实例介绍了其在几个方面的应用。
The little probability event principle is an important and basic theorem in probability which has practical applicable meaning and is often used in daily life.
概率论与数理统计的研究对象是随机现象，而随机事件及其概率是概率论与数理统计的基础。
Random phenomena are the object of study of probability theory and mathematical statistics, and random matters and their probabilities are the basis of probability theory and mathematical statistics.
概率论与数理统计的研究对象是随机现象，而随机事件及其概率是概率论与数理统计的基础。
Random phenomena are the object of study of probability theory and mathematical statistics, and random matters and their probabilities are the basis of probability theory and mathematical statistics.
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