If it is a time when children go to bed molar common stomach originally there roundworm or eat too much indigestion.

如果是孩子睡觉的时候磨牙，常见的原应有肚子里有蛔虫或吃的过多消化不良。

Consider the nematode roundworm, the most abundant of all animals.

再看看线虫，它们是所有动物家族当中最为繁盛的。