20世纪60年代，在3到6岁的儿童中开展了一项著名实验。

One famous experiment in the 1960s involved 3- to 6-year-old children.

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这本书首先描述了一个著名实验：软糖测试。

The book starts by describing a famous experiment: The Marshmallow (软糖) Test.

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这就是曾经进行过一次著名实验的房间。

This is the room where a famous experiment was here.

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这是由休斯顿的一个著名实验室提供的一份检验报告。

Here's a survey report by a well-known lab in Houston, whose testimony is absolutely reliable.

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这是伦敦一家著名实验室做的检查报告。

Here's a survey report by a well known lab in London.

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这是伦敦一家著名实验室做的检查报告。

Here's a survey report by a well known lab in London.

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