Anaerobes, clostridia included, tend to lack the enzymes catalase or superoxide dismutase, so oxygen is actually toxic to them.

厌氧菌（包括梭菌）一般都缺乏过氧化氢或超氧化物歧化；因此氧气对他们有毒害。

Neutrophils arrive quickly at the scene, and often release superoxide and their own proteases, which contribute to the problem.

中性迅速赶来，并释放超氧化物和它们自己的蛋白，加剧事态发展。

As oxygen becomes pressurized, it forms large amounts of superoxide anion (O2) and peroxide (H2O2), which are highly toxic to living cells.

当氧气被施加压力，成大量的超氧阴离子和过氧化物，这些对活有剧毒。

So if you look at oxidative stressors like nitric oxide or superoxide or hydrogen peroxide, okay, so all of these oxidative stressors, they can be good in certain amounts.

因此， 如果你观察像一氧化氮、超氧化物或过氧化氢这样的氧化应激源，好吧， 所有这些氧化应激源，在一定量内它们可能是好的。

You need a certain amount of nitric oxide, right, in your body, but too much nitric oxide is bad, too much hydrogen peroxide bad, too much superoxide is bad.

你身体里需要一定量的一氧化氮，对吧， 但是过多的一氧化氮也不好，过量的过氧化氢也不好， 过多的超氧也不好。

It affects a protein called NRF2, which moves into the DNA, binds to the DNA, and then the DNA spits out the instructions for catalase, superoxide dismutase, and glutathione.

它影响了一种名为NRF2的蛋白质，这种蛋白质进入DNA，与DNA结合，然后DNA就释放出过氧化氢、超氧化物歧化和谷胱甘肽的生成指令。