The food decays, produces large quantities of gas and causing tympanic colic which brings about asphyxiation due to internal pressure on the lungs.

• 这些未排出的食物会在消化道内产生大量的有害气体引起疝气。由于龟壳的固定容积，产生的气体不能排除使肺受到极大的压迫。