“16年就已经算是长期的实验了，”英国谢菲尔德大学的拉塞尔•汉德解释说。
"Sixteen years counts as a long term experiment," explains Russell Hand of the University of Sheffield in England.
英国谢菲尔德大学的研究人员利用人口分布的数据，创建了有200张地图的在线地图集。
Researchers from the University of Sheffield created the online atlas of 200 maps using population distribution data.
英国谢菲尔德大学的生育专家和英国生育学会秘书艾伦，佩西说：“我想小胚胎们也哭着喊着要活着见到这个世界。”
Dr Allan Pacey, fertility expert at Sheffield University and secretary of the British fertility Society, said: 'I think embryology is crying out for something like this'.
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