1. The English term for "phenomenon" is "phenomenon." The word "phenomenon" refers to an observable fact or event, often used to describe something unusual or interesting that has been observed. For example: "The recent increase in migratory birds is a fascinating phenomenon."

2. "Symptom" in English refers to a sign or indication of a disease or condition in a person's body. It can also refer to a sign of something wrong in general. For instance: "Fatigue and dizziness can be symptoms of dehydration."

3. When describing something without symptoms, the term "symptomless" can be used, although it is more commonly used in the context of diseases. For example: "Thankfully, the treatment was successful, and the patient remained symptomless."

4. It is important to note that "phenomenon" is generally used for natural or general occurrences, while "symptom" is specific to health-related signs. For instance: "The phenomemon of global warming is causing significant changes in climate patterns."

5. Correcting errors in terminology is crucial for clear communication. Mixing up "phenomenon" and "symptom" can lead to confusion. For example: "The disappearance of the species is a symptom of the ecosystem's degradation."

6. When discussing diseases or medical conditions, using the correct terms is essential for accurate descriptions. For instance: "The patient exhibited symptoms such as fever, cough, and difficulty breathing."

7. In scientific writing, it is important to use precise language. Mixing up "phenomenon" and "symptom" can undermine the credibility of the text. For example: "The phenomenon of convergent evolution is evident in the anatomical similarities between different species."

8. Overall, understanding the difference between "phenomenon" and "symptom" is key to clear and accurate communication in both casual and professional contexts. For example: "The recent economic downturn is a phenomenon that requires careful analysis and understanding."