n.细菌，bacteria的单数

原形：bacterium复数：bacteria

Farmers and consumers may be affected by harmful bacteria.
农民和消费者可能受到有害细菌的影响。
They have isolated the bacterium in its pure form.
他们已经把细菌分离出来,使它们处于较纯的状态。
The bacterium possibly goes in the human body by the mouth.
细菌可能通过口进入人体。
The bacterium Escherichia coli is commonly found in the intestines of humans and animals.
大肠杆菌（Escherichia coli）通常存在于人类和动物的肠道中。
Antibiotics are used to kill or inhibit the growth of harmful bacteria.
抗生素被用来杀死或抑制有害细菌的生长。
The discovery of penicillin revolutionized medicine by providing an effective treatment against many bacterial infections.
青霉素的发现通过提供一种有效治疗多种细菌感染的方法，彻底改变了医学界。
This bacterium is responsible for causing tuberculosis in humans.
这种细菌是导致人类患肺结核的罪魁祸首。
Lactobacillus is a type of beneficial bacterium found in yogurt and other fermented foods.
乳酸杆菌是一种有益细菌，存在于酸奶和其他发酵食品中。
Streptococcus pneumoniae is a major cause of pneumonia, meningitis, and sepsis.
肺炎链球菌（Streptococcus pneumoniae）是引起肺炎、脑膜炎和败血症的主要原因。
The bacterium Yersinia pestis was responsible for the Black Death in medieval Europe.
鼠疫耶尔森菌（Yersinia pestis）是中世纪欧洲黑死病的罪魁祸首。
Salmonella is a genus of bacteria that can cause food poisoning through contaminated food.
沙门氏菌是一类细菌，可以通过受污染的食物引起食物中毒。
Some bacteria have the ability to convert atmospheric nitrogen into a form usable by plants, a process known as nitrogen fixation.
一些细菌具有将大气中的氮转化为植物可利用形式的能力，这一过程称为固氮作用。
Antibacterial soap contains chemicals designed to eliminate bacteria on the skin's surface.
抗菌肥皂含有旨在消除皮肤表面细菌的化学物质。