1. Patients on breathing machines sometimes develop pneumonia when stomach secretions reflux into the lungs. 患者使用呼吸机时，胃分泌物返流到肺部，有时会发展为肺炎。
2. Not only could it help prevent extra weight gain, it can also lower the risk of gastroesophageal reflux and other digestive problems that may compound sleep problems. 这样做不仅能避免体重额外增加，还能降低食道胃酸逆流的风险和罹患其他加重睡眠问题的消化系疾病的可能。
3. This article gives a design scheme of inside filling of the distillation tower that can reduce reflux, and introduces the application at distillation equipment design. 本文提出了一个可减少回流量的蒸馏塔内部填料的设计方案，并介绍了它在设计蒸馏设备的应用例子。
英英解释
n.
1. an abnormal backward flow of body fluids
2. the outward flow of the tide
