It fails to factor in marginal expenditures on window-repairing, rug-cleaning, photo-processing, cell phones, sedatives.

它未能计入花在窗口修理，地毯清洗，照片冲印，手机，镇静剂上面的边际成本。

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They will exfoliate skin, removing dead skin cells and help new cell growth while repairing skin damage due to environmental assaults.

他们能去角质，去除死皮，帮助新细胞的生长，并修复环境侵害造成皮肤损伤。

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Stem cells are a kind of master cell for the body, capable of growing into various tissue and cell types, offering the possibility of repairing tissue damaged by disease or injury.

干细胞是一种机体的肥大细胞，能够分化为各种组织和细胞类型。为修复由于疾病和损伤造成的损害提供了可能。

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This molecule is involved in repairing DNA and keeps the genes in a cell intact.

BBC: How gene causes breast cancer