Law, education, mathematics, physics, geology, biology, statistics, engineering (such as machinery, water conservancy, computer, mining, architecture, etc. ), medicine, management science and engineering, psychology, engineering bioengineering, food engineering, etc.

I. Physics

Physics is based on some basic concepts and principles. For example, mass, force, speed, acceleration, energy, work, momentum and so on are all commonly used concepts in physics. Newton's three laws, the law of conservation of energy, the law of conservation of momentum, Coulomb's law and the law of electromagnetic induction are some basic principles in physics.

Physics not only provides us with a profound understanding of nature, but also has extensive applications in various fields. For example, in engineering technology, physics provides a basis for designing and improving equipment and systems; In medicine and biology, physics helps to study the structure and function of human body; In the field of information science and communication, physics provides key technologies for transmitting and processing information, and so on.

Second, biology.

Biology refers to a living body with kinetic energy and a collection of objects. Its elements include living organisms with viability and reproductive ability produced by chemical reactions under natural conditions and their living offspring produced by reproduction. They can respond to external stimuli, rely on and promote each other with the external environment, and can expel useless substances from the body, which has the characteristics of heredity and variation.

In biology and ecology, there are about 8.7 million species on the earth, 6.5 million of which live on land and 2.2 million in water. All kinds of creatures not only maintain the sustainable development of nature, but also are the basic conditions for human survival and development. However, the number of living animals has decreased sharply, only one-tenth of the original animals on earth.

Third, politics.

Politics is the specific behavior of various power subjects in the superstructure to safeguard their own interests and the specific relationship formed from it. It is an important social phenomenon in a specific period of human history. "Politics" is the main body of political power, "governance" is the method and means to maintain political power, and governance is carried out around politics.