他们在远离非洲的过程中丢失了一部分遗传变异，”Rosenberg说。

So there is a loss of genetic diversity with the distance from Africa, " Rosenberg said.

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由115座岛屿组成的塞舌尔群岛位于马达加斯加以北远离非洲东海岸的地方。

North of Madagascar, off Africa's east coast, are the 115 islands of the Seychelles.

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远离非洲来到美国中部印第安州的哥伦布市，制造引擎的康明斯公司的代表在公司总部为来访者作导览。

Far away from Africa, in the central U.S. state of Indiana, in the city of Columbus, a representative for the Cummins engine-making company gives a tour of headquarters.

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