The large tongue often leads to the mouth being open, so that saliva runs out. But if the child is taught hygiene from an early age, and taught to pull his or her tongue back into the mouth, keeping the mouth closed, then the problem of saliva running out can be avoided.
舌頭大常導致嘴巴張開、口水外流，但只要從小培養他的衛生習慣，教他舌頭縮進去，嘴巴閉起來，淌口水的情形就可避免。