Although the likelihood of any neutral mutation spreading by chance is tiny, the enormous number of mutations in each generation makes genetic drift a significant force.
虽然任何中立变异随机传播的可能性很小，每一代个体产生的大量变异却使基因漂变具备显著的力量。
But malnutrition 'is a driving force in emerging infectious diseases that are spreading around the world, ' she says.
说，许多人或许认为地球另一边的人营养不良不关他们的事，但正是营养不良促使了在全球肆虐的新型传染疾病的出现。
But malnutrition 'is a driving force in emerging infectious diseases that are spreading around the world, ' she says.
说，许多人或许认为地球另一边的人营养不良不关他们的事，但正是营养不良促使了在全球肆虐的新型传染疾病的出现。
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