circulation reflux

例句：

1. 1.The blood in our body is constantly circulating.
   我们体内的血液一直在循环。
2. 2. The heart's job is to circulate the blood throughout the body.
   心脏的工作是在整个身体中循环血液。
3. 3. Circulation rates are measured in millimeters per minute.
   血液循环速率以每分钟的毫米为单位测量。
4. 1.He had a stomachache and experienced a reflux of acid into his esophagus.
   他胃疼，胃酸回流到食管里。
5. 2.The patient was given medication to prevent reflux.
   病人被给予药物以防止反流。
6. 3.Reflux can cause serious health problems if left untreated.
   如果不治疗，反流可能会导致严重的健康问题。