Flatus, as medical journals call it, is partially produced by swallowing air as you go about your life.

医学期刊称，屁部分产自你生活中吸入的气体。

The light of the sun hurt his eyes. His mouth opened, and he swallowed air.

刺眼的阳光让他不得不眯起眼睛，他嘴巴张开，吸进空气。

Eyes wide open, mouths moving, swallowing air, can't tell flakes from poop.

睁大眼睛 动动嘴 大口吞入空气，分不清碎屑和粪便。

It's typically caused by either trapped, swallowed air or gas produced as a byproduct from friendly microbes digesting food in your gut.

它通常是由被困、吞咽的空气或作为消化肠道食物的友好微生物的副产品产生的气体引起的。