Three groups of people who didn't know the twins' real ages guessed how old they were.
三组不清楚双胞胎真实年龄的人对他们年龄进行猜测。
Kids were evaluated between the ages of three - to five-years-old and again from nine to 13-years-old.
孩子们按照两个年龄段进行评估,一个是2 - 5岁年龄段,另一个是9 - 13岁年龄段。
Three centuries after Isaac Newton published his Opticks, that ages-old science got really weird.
3个世纪前,艾萨克·牛顿出版了《光学》;今天,这门古老的科学变得十分离奇。
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