Question

请帮忙翻译一下，谢谢！

1、The research done by the Dement commission shows that Americans sleep less than is good for them.
2、By "……challenges explanation" (Line 2, Para.1) the author mean that it‘s no easy job to provide an adequate explanation。
翻译中文。

Answer 1

1、由德蒙特委员会所做的研究表明美国人睡眠较少（的习惯）有利于他们。

2、作者通过“……挑战了解释”（第一段第二行）表达的意思是想要给出正确的解释并非易事。

Answer 2

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