"They get spoiled and cannot concentrate on any one thing long enough to learn from it," said Lerner, a childhooddevelopment researcher.
“他们被宠坏了,无法长时间专注于一件事,也无法从中学到什么。”一名叫雷纳的儿童发展研究员说。
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They point out that free-time activities play an important role in childhooddevelopment and that large amounts of homework reduce children's free time, hindering their development.