求翻译：现在QQ聊天越来越普遍，很多中学生也经常使用QQ聊天。对此我们做了对中学生聊QQ利与弊的观点调查。有些学生认为QQ是一种有用的交流工具。省钱是什么意思？

QQ chat now increasingly common, many students often use QQ chat. We do the pros and cons of high school students view QQ chat survey. Some students think QQ is a useful communication tool. Save money

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Now QQ chats more and more universally, very many middle-school students also frequently use QQ to chat.Regarding this we did chatted the QQ advantage to the middle-school student and the shortcoming viewpoint investigation.Some students thought QQ is one kind of useful exchange tool.Economizing

QQ chat now more common, many students often use QQ chatting. For this we have done on high school students talking QQ pros and cons of opinion. Some students think that QQ is a useful communication tool. To save money