这种长期的系统变化说明自然选择的作用，并表明女性骨骼的特性较大的适应性。但是，情况完全是这样的吗？
A systematic long-term change of this kind suggests the action of natural selection and indicates that female skeletal characteristics confer greater fitness. But is this the whole story.
特雷格尔博士说，女性应该在避免皮肤癌和保护骨骼之间取得平衡。
Dr. Tregear says women should try to strike a balance between avoiding skin cancer and protecting their bones.
雌性激素会抑制女性脸部下方和脸颊的骨骼生长，使得这两个部位相对较小、较短，额头部位也是如此，让她的眼睛更深邃。
Estrogen caps bone growth in a woman's lower face and chin, making them relatively small and short, as well as the brow, allowing for her eyes to appear prominent, Thornhill explained.
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