It consists of peptidoglycan which usually helps differentiate whether bacteria are gram positive or gram negative.

胞壁由肽聚糖组成，通常可以帮助菌的种类，判断它们是革兰氏阳性菌还是革兰氏阴性菌。

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腐生葡萄球菌和其他革兰氏阳性球菌，如链球菌和肠球菌这一类过氧化氢酶阴性的菌。

Bacteria with no membrane, gram positive, retain the purple staining visible under a microscope.

无膜的革兰氏阳性菌在显微镜下可见保留紫色染色。

In gram positive bacteria this layer forms part of the cell wall, so penicillin can easily attack it.

在革兰氏阳性菌中， 这一层构成了胞壁的一部，因此青霉素能够轻易攻击它。

They have a cell wall which protects the bacteria, determines whether they are gram positive or gram negative bacteria and also helps maintain their shape.

保护菌的胞壁决定了菌是革兰氏阳性菌还是革兰氏阴性菌，并且参与维持菌的形状。

When doing a Gram stain, Clostridium tetani stains purple— or gram positive— and it's a bacillus, meaning that it looks like a big cylinder or rod under the microscope.

革兰氏染色中，破伤风梭菌显紫色（革兰氏染色阳性），呈棒状：显微镜下外观像一个巨大的圆柱体或棒子。