1. Determine the meaning of a symbol: Before using any symbol, you should clearly understand its meaning. If you are not sure about the meaning of a symbol, you'd better consult the relevant reference materials.
2. Use standard symbols: Different disciplines and fields may have different symbol systems. You should use those widely accepted standard symbols. For example, in mathematics, variables and constants are usually represented by Greek letters, while in physics, physical quantities are usually represented by capital letters.
3. Don't overuse symbols: Although symbols can help you express your thoughts more accurately, overuse of symbols may make your paper difficult to understand. You should minimize the use of unnecessary symbols and use them only when necessary.
4. Consistency: In your thesis, you should always keep consistency in the use of symbols. For example, if you use a symbol to represent a concept in a paragraph, you should use this symbol to represent the concept throughout the article.
5. Citation source: If you use a specific symbol, you should provide enough information in your paper to let readers know the source of this symbol. This can help readers understand your paper better.
6. Avoid confusion: Try to avoid using multiple identical symbols to express the same meaning in the same paper, which may confuse readers. If you must use more than one of the same symbols, you can enclose them in parentheses to help distinguish them.