使孩子区别于成年人的不是他们的无知，也不是他们技能的缺乏。

The thing that sets children apart from adults is not their ignorance, nor their lack of skills.

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一项新的研究表明，日常生活中的对话节奏可能过于轻快，以致于阻碍了一些孩子区分不同的声音和单词的能力。

A new study suggests that the conversational pace of everyday life may be so brisk it hampers the ability of some children for distinguishing discrete sounds and words.

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每个子区间的宽度趋于零。

The width of each subinterval goes to zero .

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