细菌和病毒都可能导致这种病。
最常见的两种病原体是细菌和病毒。
The two most common types of germs are called bacteria and viruses.
细菌和病毒容易反复感染。
一口痰就含有成千上万的细菌和病毒，北京有多少人？
One single sputum contains thousands upon thousands of germs and viruses. How many people in Beijing?
很多致病的元凶如细菌和病毒均是纳米大小。
Many disease-causing culprits such as bacteria and viruses are nano size.
每次你泡澡或淋浴时，都从身上洗掉了细菌和病毒。
Every time you take a bath or shower, you remove germs and viruses from your body.
一些细菌和病毒活跃于简单的化合物诸如酒精中。
Some species of bacteria and virus thrive on simple compounds such as alcohol.
也就是说，它们能够破坏细菌和病毒，并能迅速分解有机分子。
That means they destroy bacteria and viruses, and break up organic molecules with alacrity.
防护口罩是否能够防护象细菌和病毒这样的微生物？
Can respirators protect you from biological agents such as Bacteria or Viruses?
我国古人所患的疾病也一定都带有不同的细菌和病毒。
The ancients of China's illness must also carry various bacteria and viruses.
科学家很久以来就知道在太空细菌和病毒的繁殖会更迅速毒力会更强。
Scientists have long known that bacteria and viruses grow more rapidly and virulently in space.
问6：呼吸防护口罩能够防细菌和病毒这类病原微生物么？
Q6: Can respirators protect you from biological agents such as bacteria or viruses?
许多蕈类中能有效抵抗真菌、细菌和病毒的生物活性物质已经得到确认。
A large number of bioactive substances from mushrooms which are effective against fungi, bacteria and viruses have already been identified.
臭氧作为一种极强的氧化剂，对细菌和病毒有很好的杀灭效果。
As an extremely strong oxidant, ozone has a good effect of destroying bacteria and viruses.
抗体——人类抵抗细菌和病毒的天然防护的关键——也可能保护我们免遭中风。
ANTIBODIES - the linchpin of our natural defences against bacteria and viruses - may also protect us from strokes.
饮水机长期使用没有定期消毒，细菌和病毒也会对水超成二次污染。
Long term use of drinking fountains without regular disinfection, bacteria and viruses will be two times the water pollution.
细菌和病毒等致病微生物广泛存在于化粪池、污水污泥、废水等源头。
Pathogens such as bacteria and viruses are widely spread in septic tanks, sewage sludge, wastewater and other sources.
只是他的免疫系统的功能还不够强大，不能抵御外界细菌和病毒的侵害。
He is only the function of the immune system strong enough and can not resist the outside of bacteria and viruses.
更进一步只有致病的细菌和病毒的DNA会发生这样的信号普通的大肠杆菌却不会。
And further, only bacteria and viruses pathogenic to humans produce this signal; ordinary E. coli does not.
但是细菌和病毒繁殖迅速，因此自然选择可以在短时间内发挥作用，使人们能够观察得到。
Butbacteria and viruses breed fast, so natural selection hastime, within the spanof a human life, to make a difference.
与此同时，鼻子和喉咙——这里是细菌和病毒常常潜伏的地方——的血管收缩。
At the same time, blood vessels constrict in the nose and throat, where bacteria and viruses often lurk.
在人类历史中，人们也不相信存在细菌和病毒，就算他们会因细菌和病毒而死。
For most of human history, bacteria and viruses weren't believed to be real even though people died of them.
扁桃体是位于咽喉后部的组织团块，能够阻拦和捕捉人们呼吸时吸入的细菌和病毒。
The tonsils are masses of tissue at the back of the throat that trap bacteria and viruses a person may breathe in.
制造商说这些设备可以杀死细菌和病毒，因为它们可以去除细菌赖以生存的潮湿环境。
Makers of the devices say they kill bacteria and viruses because they help to remove the wetness that germs need to survive.
该领域的课程包括细菌和病毒的分子遗传学、人类遗传学、动植物杂交培育和其他相关。
Classes in this field explore the molecular genetics of bacteria and viruses, human heredity, plant and animal hybridization, and related topics.
锌对免疫系统至关重要——它可以促进白细胞生长，消灭可导致流感或感冒等疾病的细菌和病毒。
Zinc is critical for the immune system - it rallies white blood cells, to attack bacteria and viruses like a flu or cold.
但研究表明，如今大部分飞机上的高效微粒空气过滤器能够滤掉99.97%的细菌和病毒微粒。
But studies have shown that high-efficiency particulate air (HEPA) filters on most jets today can capture 99.97% of bacterial and virus-carrying particles.
但研究表明，如今大部分飞机上的高效微粒空气过滤器能够滤掉99.97%的细菌和病毒微粒。
But studies have shown that high-efficiency particulate air (HEPA) filters on most jets today can capture 99.97% of bacterial and virus-carrying particles.
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