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客观事物总在不断发展变化,科学研究的目的就是要认识事物发展变化的规律,寻找影响其发展变化的原因。在实际研究工作中,我们常用变量来表示研究的对象——事物的某个特性,用另一些变量代表影响这个特性变化的因素。如果我们的研究理论正确,获得研究对象特性的方法科学可靠,就可直接用变量变化的规律描述事物特性的变化规律,通过控制和观察其他变量的变化研究影响事物特性的原因。变量的不同数据代表了事物特性的不同状况,我们可
Objective things always evolve and change. The purpose of scientific research is to understand the laws of things and change and find out the reasons that affect their development and changes. In practical research, we often use variables to represent the object of study - a certain characteristic of things, and use other variables to represent the factors that affect the change of this characteristic. If our research theory is correct and the method of obtaining the characteristics of the research object is scientific and reliable, we can directly describe the variation of the characteristics of the things by the law of the variation of the variables and study the causes that affect the characteristics of the things by controlling and observing the changes of other variables. Different data variables represent the different characteristics of things, we can