symptom group的用法和樣例：
例句
- Myelodysplastic Syndromes are a group of conditions that cause insufficient production of blood cells, which is often lethal.
骨髓增生異常綜合征是一組條件不足，造成生產的血細胞，這往往是致命的。 - Conclusion Abdominalgia is a common clinical symptom for the patients with hemorrhagic fever with renal syndrome,the occurrence is closely related to the state of the disease.
結論腹痛是腎綜合征出血熱患者較常見的臨床癥狀，與其病情密切相關。
