My other feelings about travel
The time machine tells us that the world is four-dimensional. Any entity must extend in four directions. It must have length, width, thickness and duration in time. The time traveler invented the time machine, took me to start a wonderful time travel with the time machine, let me see the great changes of the earth after 80000 years. At that time, except for human beings, other mammals were extinct, and there was a terrible phenomenon of human eating.
By reading this book, I have learned the basic principles of material existence, and I know that the entities of existence should be objective. Moreover, human research is only a small part of the whole scientific field, and most of the fields are not understood by human beings at present. Human power is very small, so we should respect nature. When I grow up, I will also explore the unknown areas of human beings and study more principles of time and space.
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