It shows that they will not feel alone because they have many friend who live together in the boarding school. So, they will not feel lonely.
มีเด็กอีกจำนวนมากที่อยู่ในโรงเรียนประจำ
It shows that they will not feel alone because there are many children who are in boarding school. So,they can talk to each other with friend in boarding school.