Dr. Tregear says women should try to strike a balance between avoiding skin cancer and protecting their bones.
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。
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Dr Tregear says women should try to strike a balance between avoiding skin cancer and protecting their bones, by going outside when it's sunny for 20 minutes without wearing sun cream.