数学
基础概念
Algebra：代数
- Example: The equation (x^2 - 5x + 6 = 0) is a simple algebraic expression.
Geometry：几何
- Example: A triangle has three sides and three angles.
Trigonometry：三角学
- Example: The sine of an angle in a right triangle is the ratio of the opposite side to the hypotenuse.
高级概念
Calculus：微积分
- Example: The derivative of a function gives the rate at which the function is changing.
Statistics：统计学
- Example: The mean of a set of numbers is the sum of the numbers divided by the number of numbers.
科学
物理学
Physics：物理学
- Example: Newton’s laws of motion describe the relationship between the motion of an object and the forces acting on it.
Mechanics：力学
- Example: The force of gravity pulls objects towards the center of the Earth.
生物学
Biology：生物学
- Example: Photosynthesis is the process by which plants convert light energy into chemical energy.
Ecology：生态学
- Example: An ecosystem is a community of living organisms in a particular area interacting with each other and their environment.
英语
基础语法
Noun：名词
- Example: The word “cat” is a noun.
Verb：动词
- Example: The word “run” is a verb.
高级语法
Adjective：形容词
- Example: The word “happy” is an adjective.
Adverb：副词
- Example: The word “quickly” is an adverb.
历史
古代史
Ancient History：古代史
- Example: The Great Wall of China was built in the 7th century BC.
Medieval History：中世纪史
- Example: The Middle Ages were a period of time in Europe between the fall of the Roman Empire and the beginning of the Modern Age.
近代史
Modern History：近代史
- Example: The Industrial Revolution began in the late 18th century.
Contemporary History：当代史
- Example: The Cold War was a period of political tension between the United States and the Soviet Union from the late 1940s to the early 1990s.