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each of these idioms with one word:On the one пустоhand , I don't think that schoolchildren should have mobile phones. No one knows what the health risks may be for young people's brains. On the пустоother hand, they are a useful way for kids to get in touch with their parents when there is a crisis. Be that as it пустоmay , it is still a nuisance when phones go off in the middle of a lesson. To put it in a пустоnutshell , there are a lot of pros and пустоcons with regard to kids and mobiles.