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New research from child advocacy group Common Sense Media has found that children's use of tablets, smartphones and other portable gadgets with screens has exploded over the last two years, just as doctors warn too much screen time could be bad for kids. 儿童倡导组织Common Sense Media的最新调查发现，尽管医生警告太久盯着屏幕可能对儿童不利，儿童对平板电脑、智能手机等带屏便携设备的使用率在过去两年仍呈现爆炸式增长。 The group's biannual survey of American parents found an 89% increase in the number of zero to eight year olds who have used mobile devices - growing from 38% in 2011 to 72% in 2013. Even among kids under the age of two, some 38% have used a mobile device for media, compared to 10% two years ago. 该组织对美国父母进行的一年两次的调查显示，0-8岁儿童中使用移动设备的人数比例从2011年的38%升至2013年的72%，增长89%。即便在两岁以下幼儿中，也有38%左右的儿童使用过移动媒体设备，而两年前这一比例只有10%。 Moreover, the amount of time all kids spend with the devices each day has tripled, from 5 minutes to 15 minutes. 除此之外，所有儿童每天使用移动设备的时间也增加了两倍，从5分钟增至15分钟。 | 
