研究者还随机选择了478个孩子作为对照组,没有给他们阅读书籍,而是给他们免费的活动和猜谜书籍(不清楚是些什么书)。
The researchers also selected at random a control group of 478 children who weren't given reading books. Those children were offered free activity and puzzle books.
研究者还随机选择了478个孩子作为对照组,没有给他们阅读书籍,而是给他们免费的活动和猜谜书籍(不清楚是些什么书)。
The researchers also selected at random a control group of 478 children who weren't given reading books. Those children were offered free activity and puzzle books.
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