The posterior opening of the digestive tract through which indigested substances are eliminated from the body .

消化道末端的开口,未被消化的食物经此排出体外。

The vomitus of yesterday morning was described as containing indigested food and greenish water with no evidence of blood .

昨天早晨的呕吐物，被形容为含有未消化的食物和绿水，无血。