Even if the oil spill was not the direct cause of dolphins' death, it still could be a factor.

即使石油泄漏不是海豚死亡的直接原因，它仍可能是一个因素。

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It can be a direct cause of death but is also the most important single risk factor for disease in young children.

它可以是死亡的直接原因，但也是导致幼儿患病的最重要的一个危险因素。

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BACKGROUND: mechanic pressure could cause neurocyte death. Both direct mechanic injury and complex pathophysiological mechanism can induce the pathological changes of axon and neuronal soma.

背景：机械压迫可造成神经细胞死亡，直接的机械性损伤和复杂的病理生理学机制都可导致轴突和神经元胞体的病变。

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Studies demonstrate that cachexia is the direct cause of death in a small number of cancer patients (1 to 2 percent).

CNN: Is the inability of cancer patients to eat a concern?

They then went through them to see how many mentioned MRSA, the drug-resistant form of the infection, as a direct or contributing cause of death.

BBC: NEWS | Health | Superbug deaths increase 15-fold