但通过调查研究
But through investigation and research
以上为机器翻译结果，长、整句建议使用 人工翻译 。
通过调查研究，了解到不上网的初中生很少，绝大多数初中生都上网，但网络成瘾的初中生也很少。
We are known from the investigation that few students never online, most of them have ever surfing net, but Internet addiction is few, too.
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