These damages may arise from reactive oxygen species, intercalating agents, radiation, depurination, and deamination.

这些损害可能是由于活性氧，嵌入剂，辐射，脱嘌呤和脱氨作用引起的。

With lastingness of infection, the productive rate of reactive oxygen species decreased gradually, and photosynthesis also weakened.

随着感染时间的不断延长，活性氧的产生速率逐渐降低，同时光合作用逐渐减弱。

Do reactive oxygen species play a role in myeloid leukemias?

活性氧在髓性白血病中发挥作用吗？

Reactive oxygen species (ROS) are produced in normal cell life.

正常细胞的一生中可以产生活性氧基团（ROS）。

Conclusion: Reactive oxygen intermediates was a mediator of apoptosis induced by TNF.

结论：活性氧中间产物是TNF诱导细胞凋亡的中介体之一。