五、实验期所谓实验,即在人为条件下观察自然现象,它是以人们对于研究对象的已有认识为前提,让自然对研究者提出的疑问作出回答。这就避免了在自然条件下偶然因素的影响。实验目的,有的是为了明确某种因素与研究对象的关系;有的是为了探寻某种物质的结构;有的则是为了验证假说。在实验 Fifth, the experimental period The so-called experiment, that under the artificial conditions of natural phenomena, which is based on people’s existing understanding of the subject as a prerequisite for natural questions to the researchers to answer. This avoids the influence of accidental factors under natural conditions. Some of the purpose of the experiment, in order to clarify the relationship between a certain factor and the object of study; some is to explore the structure of a substance; some is to verify the hypothesis. In experiment