They exert the therapeutic action on brain stem injuries by way of immigrating to the injured brain areas.

骨髓基质细胞源神经干细胞可通过向损伤脑区的迁移而发挥治疗作用。

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Oxygen will exert a chemical action on metals.

氧会对金属产生化学作用。

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Elevation of iron content in SN is one of the mechanisms responsible for the reduction of DA content. Desferrioxamine mesylate may exert a protective action on dopaminergic neurons.

由于铁可导致DA神经元死亡，因此铁含量的增加可能是DA含量减少的原因之一，甲磺酸去铁胺具有保护DA神经元的作用。

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In Washington, U.S. Secretary of State Colin Powell called on Palestinian Authority President Yasser Arafat to match his promises of a cease-fire with "action on the ground" and exert greater control over militant Palestinian factions.

CNN: Israel begins burying bombing victims