1. Achalasia is a rare disorder that affects the ability of the esophagus to move food toward the stomach.
食管失弛缓是一种罕见的疾病，会影响食管将食物推向胃的能力。
2. Patients with achalasia often experience chest pain and regurgitation of food.
食管失弛缓症患者通常会出现胸部疼痛和食物反流。