零售商疯狂的开店已经把中国变成了购物天堂，但店主们所面临的竞争却日益残酷，因为他们明白只有强者才能生存。
The scramble to open stores has made China a paradise for shoppers, but for shopkeepers it has become a brutally competitive market in which only the strong will survive.
另一些专家用婴儿死亡率来解释。很高的婴儿死亡率只有最顽强者才能生存下来，而这些最顽强者倾向于拥有一颗大脑袋。
Other experts say that with high infant mortality, only the toughest survived - and the toughest tended to have big heads.
另一些专家用婴儿死亡率来解释。很高的婴儿死亡率只有最顽强者才能生存下来，而这些最顽强者倾向于拥有一颗大脑袋。
Other experts say that with high infant mortality, only the toughest survived - and the toughest tended to have big heads.
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