新近这项研究根据他们可接触多少书籍等因素调查了每个孩子的生活环境，并对每个孩子的母亲进行了智商测试。
The latest study examined and rated each child's environment based on factors such as how many books are available, and gave each mother an IQ test.
新近这项研究根据他们可接触多少书籍等因素调查了每个孩子的生活环境，并对每个孩子的母亲进行了智商测试。
The latest study examined and rated each child's environment based on factors such as how many books are available, and gave each mother an IQ test.
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