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

厌（包括梭）一般都缺乏过酶或超物歧酶；此气对他们有毒害。

2.Staph saprophyticus is catalase positive, so it makes an enzyme called catalase.

腐生葡是过酶阳性的，它能产生一种称为过酶的酶。

3.And it'll also make your cells fizz, because your cells also have catalase in them.

它也会让你的细胞产生嘶嘶声，为你的细胞中也含有过酶。

4.And it'll also make your cells fizz, because your cells also have catalase in them. Why?

还会让你的细胞嘶嘶作响，为其中也含有过酶。为什么？

5.But, when peroxide comes at your cells from the outside, the catalase can't protect them.

但是，当过物从体外进入到你的细胞内部时，过酶并无法起到保护作用。

6.That's mostly the peroxide reacting with an enzyme inside the bacteria, called catalase, forming water and oxygen gas.

主要是过物与细内部称作过酶的一种酶正在进行反应，形成水和气。

7.And it’ll also make your cells fizz, because your cells also have catalase in them.

它还会使您的细胞发出嘶嘶声，为您的细胞中也含有过酶。机翻

8.We can use this to differentiate Staph saprophyticus from other gram positive cocci, like streptococci and enterococci, which are catalase negative.

我们可以利用这一特性来区分腐生葡和其他革兰氏阳性，如链和肠这一类过酶阴性的细。

9.But, when peroxide comes at your cells from the outside, the catalase can’t protect them.

但是，当过物从外部进入您的细胞时，过酶无法保护它们。机翻

10.That’s mostly the peroxide reacting with an enzyme inside the bacteria, called catalase, forming water and oxygen gas.

这主要是过物与细内的一种酶反应，称为过酶，形成水和气。机翻

11.So, if catalase is present, like in staph saprophyticus, it makes hydrogen peroxide dissociate into water and oxygen, making the mixture foam.

如果存在过酶（如腐生葡），它会使过分解成水和气，使混合物出现泡沫。

12.So your cells are stocked with catalase to help turn that hydrogen peroxide into water and oxygen before it can do any harm.

所以你的细胞中存有过酶，以帮助这些过转换成水和气，以免产生任何危害。

13.The cells in our hair bulb produce a little bit of hydrogen peroxide, which is a metabolic byproduct, and typically there's an enzyme called catalase that breaks this down to water and oxygen.

我们毛中的细胞会产生一点过, 这是一种代谢副产物, 通常有一种叫做过酶的酶将其分解为水和气。机翻

14.It's a non-spore forming, aerobic, facultative intracellular, catalase and oxidase positive bacteria that is best visualized with silver stain and grows well on BCYE agar with cysteine and iron into grey-white colonies with a cut-glass appearance.

它是非芽孢、需、兼性细胞内寄生、酶和过酶阳性的细；最佳观察方式是银染色；在BCYE培养基供给半胱氨酸和铁的情况下生长良好，可形成雕花玻璃样的灰白色落。

15.But as we age, there's declining levels of catalase, and this allows the build-up of hydrogen peroxide in the hair bulb, which damages and destroys the melanocytes, or the pigment producing cells, of our hair.

但随着年龄的增长，过酶的水平会下降，这会导致毛中过的积聚，从而损害和破坏头发的黑色素细胞或产生色素的细胞。机翻

16.Alright, as a quick recap: Staphylococcus saprophyticus is round, gram-positive, facultative anaerobic, non-motile, non-spore forming, catalase positive, coagulase negative, urease positive, and novobiocin resistant bacterium, which is known to be part of the normal flora of the perineum.

得！来快速回顾一下：腐生葡是一种圆形的、革兰染色阳性的、兼性厌细，无运动能力、不形成孢子，且过酶阳性、凝固酶阴性、脲酶阳性，对新生霉素耐药，它是已知的会阴正常群的一部分。

17.Legionella pneumophila is non-spore forming, aerobic, which means it needs oxygen to survive, facultative intracellular, which means it can survive both inside and outside the cell, and oxidase and catalase positive, which means it produces both of these enzymes.

嗜肺军团是一种非芽孢好细，需要气才能存活，也是兼性细胞内寄生，即它在细胞内外均可生存，酶和过酶阳性，即它可以产生这两种酶。