长时间看屏幕会影响孩子的大脑发育。
以前的研究发现虽然长时间看屏幕会使身体素质降低，经常锻炼却能促进身心健康。
Earlier studies have found that while more time spent in front of a screen led to lower well-being, physical activity improved one's state of mind.
他们担心上网时间太长会影响儿童读写的能力，科学家们认为长时间看屏幕会破坏儿童脑部发育。
It is feared that spending so much time online will mean they lack reading and writing skills, and scientists believe the glare from the screen may damage the brain development of young children.
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