求翻译：有的家长认为，让孩子带手机，主要是为了应付突发事情，能够让孩子在第一时间与家长、老师取得联系，同时家长也能掌握孩子上下学时间。是什么意思？

Some parents believe that children with cell phones, mainly to cope with unexpected things, can let the children the first time with parents, teachers get in touch, but parents can control their children to school time.

The parents were of the view that let the kids have cell phones, mainly in order to cope with unexpected things, to be able to let the child in the first time contact with the parents, teachers, and parents are also able to have children to and from school.

Some guardians believed that, lets the child cloth for wiping tables machine, mainly is in order to deal with arises suddenly the matter, can let the child in the first time and the guardian, teacher obtains the relation, simultaneously the guardian also can grasp about the child the study period.

Some parents believe that children with mobile phones, mainly to cope with the sudden things that make children get in touch with parents and teachers for the first time, both parents are able to master the children from school.

Some parents believe that children with mobile phones, mainly to cope with the sudden things that make children get in touch with parents and teachers for the first time, both parents are able to master the children from school.