Many scientists once believed that physical similarities between identical twins are genetic, while their personalities, intelligence and other differences between them are an effect of their environment.
In 2001, Danish researchers conducted physical and cognitive tests on more than 1,800 pairs of twins over aged 70, as well as taking photos of their faces.
2001年，丹麦研究者对1800多对年过70的双胞胎进行了身体和认知测试，还拍了他们的脸部照片。
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It leverages the intelligence of a digital product or production model to create twins between the physical and digital worlds, weaving a digital thread through product and production lifecycles.