求翻译：2、造成青少年视力下降、生物钟紊乱、神经衰弱等生理特征。不能维持正常的睡眠周期，停止上网时出现失眠、头痛、注意力不集中、消化不良、恶心厌食、体重下降。是什么意思？

2, resulting in decreased vision young people, the biological clock disorders, neurasthenia and other physical characteristics. Can not maintain a normal sleep cycle, stop the Internet when insomnia, headache, inability to concentrate, indigestion, nausea, anorexia, weight loss.

2, the young people decreased visual, biological clock is in disorder, physical characteristics, such as nervous. Unable to maintain normal sleep cycles, and stop on the Internet, insomnia, headaches, poor concentration, dyspepsia, nausea anorexia, weight loss.

2, causing decreased vision for young people, the body clock disorder, neurasthenia and other physiological characteristics. Unable to maintain a normal sleep cycle, stop the Internet insomnia, headache, attention deficit disorder, dyspepsia, nausea, anorexia, weight loss.

2, Cause physiological characteristics such as teenagers' eyesight dropping, biological clock disorder, neurasthenia,etc.. Can't maintain normal sleep cycle, present insomnia, have a headache while stopping surfing the Net, the lack of concentration, indigestion, sick apocleisis, weight drop.