There may be several reasons for not understanding: Language barrier: If you don't understand the language style, vocabulary, and grammar structure of the article, you may have difficulty reading it. It could be because he was unfamiliar with a language or dialect. Sometimes the context of an article may be very important. If you don't understand the meaning of the context, you may misunderstand. 3. Reading speed is not fast enough: reading speed is not fast enough may lead to reading incomprehension because reading speed is not fast enough and it takes more time to understand each word and sentence. 4. Insufficient vocabulary: If your vocabulary is insufficient, you may misunderstand the meaning of the article. 5. The purpose of reading is unclear. If the purpose of reading is unclear, such as to learn new knowledge or find information, you may not understand it. If you don't understand, it's recommended to check for language barriers, try to expand your vocabulary, understand the background and theme of the article, or slow down your reading speed to make sure you understand every word and sentence.