It's a facultative anaerobe so that means it can undergo respiratory and fermentative metabolism.

它是厌氧菌，这意味着它可以经历呼吸和发酵代谢。

Select the advantages that a biped or facultative quadruped could gave.

选择双足动或四足动可以提供优势。

At some point, the obligate quadrupeds like the sauropods would have had facultative bipedal ancestors.

在某个时候，像蜥脚类动这样专四足动会有双足动先。

That makes the environment on the enamel surface favorable for facultative anaerobic bacteria, which can metabolize sugars with and without oxygen present.

这使牙釉表面环境有利厌氧菌生存；厌氧菌即使在缺氧情况下也可以代谢糖类。

Let's think of some of the advantages of being a biped or facultative quadruped.

让我们想想作为双足动或四足动一些优势。

It's non-motile and doesn't form spores, and also, it's a facultative anaerobe, meaning that it can live with or without oxygen.

它没有运动能力，也不会形成孢子，同时，它也是厌氧细菌，意味着它可以在有氧或无氧条件下生存。

Facultative roughly means optional, so a bear can optionally walk on two legs.

大致意思是可选，所以熊可以选择用两条腿走路。

Bears and all animals that can, but usually don't walk on two legs can be called facultative bipeds.

熊和所有可以但通常不会用两条腿走路动都可以称为两足动。

Remember a facultative quadruped is a biped that has the option to move on four limbs, just not all the time.

请记住，四足动是一种可以用四肢移动双足动，只是不是一直都可以。

It typically bounds at high speeds on two legs, but will walk on four legs when it is moving more slowly it would be considered a facultative quadruped.

它通常用两条腿高速跳跃，但当它移动得更慢时会用四条腿行走，这将被视为四足动。

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、需氧、细胞内寄生、氧化酶和过氧化氢酶阳细菌；最佳观察方式是银染色；在BCYE培养基供给半胱氨酸和铁情况下生长良好，可形成雕花玻璃样灰白色菌落。

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.

嗜肺军团菌是一种非芽孢好氧细菌，需要氧气才能存活，也是细胞内寄生菌，即它在细胞内外均可生存，氧化酶和过氧化氢酶阳，即它可以产生这两种酶。

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：腐生葡萄球菌是一种圆形、革兰染色阳、厌氧细菌，无运动能力、不形成孢子，且过氧化氢酶阳、凝固酶阴、脲酶阳，对新生霉素耐药，它是已知会阴正常菌群一部分。