Plants need to obtain the full spectrum of nutrients from the environment where are extremely rich in microorganisms during the growth of plant, but infection remains a rare event.
植物在生长过程中需要从富含微生物的环境中获取全部营养物质，但它们却很少被感染。
Various interventions, such as infection-fighting drugs, can increase a population's average survival time, but only approaches that slow the body's rate of aging will increase the maximum lifespan.
各种干预措施，如抗感染药物，可以增加人口的平均存活时间，但只有那些减缓人体衰老速度的方法才能延长最长寿命。
Application of marlex might increase inflammation response, but it will not increase the incidence of infection.
尽管网片的应用可能增大炎性反应，但并不会增加感染的几率。
She briefly recovered half the vision in her right eye in 2007 but an infection blinded her again.
在2007年，她的右眼恢复了一半的视力但很快由于感染而再次失明。
Physicians trying to treat brain tumors can use drugs to open the junctions between cells, but that leaves the brain temporarily vulnerable to infection.
治疗脑部肿瘤的医生虽然能够利用药物打开细胞间的接缝，但这也会使得大脑暂时很容易受到感染。
But the infection that causes it is now treated by drugs.
但是现在的药品却可以治疗引起的感染症状。
So the dilemma facing pregnant women is that there is a small but quantifiable risk associated with infection and an unknown but probably only very small risk associated with the vaccine.
因此，孕妇面对两难的处境，接种有不大但可以计量的与感染有关的风险，还有未知的但也许只是非常小的与疫苗有关的风险。
Histoplasmosis is a fungal infection that primarily affects the lungs but may also affect other organs.
组织胞浆菌病是一种真菌感染，主要影响肺部，但也可能影响其他器官。
The fungus might be using sunlight to synchronizethe final part of the infection, but this is still speculation, Hughes said.
真菌也许是利用太阳光来同步感染的最后部分，但这还是个猜想，休斯说。
Synthetic vessels made of Teflon exist, but they are prone to infection and blockage by blood clots, and tend to work for only a few months.
现已存在聚四氟乙烯制成的人造血管，但它们很容易感染和形成血栓，且往往只能起几个月的作用。
Herpes simplex keratitis can occur in the context of primary herpes simplex virus infection but is observed more frequently in secondary or recurrent disease.
单纯疱疹性角膜炎可以原发性单纯疱疹病毒感染的形式发生，但其一般常继发于其它疾病或反复发作。
Monkeys are susceptible to infection but are not considered viable reservoir hosts as virtually all infected animals die too rapidly to sustain survival of the virus.
猴子易受感染，但未被认为是可生存的有效储主，因为几乎所有受感染动物太快死亡以至于不能维持该病毒的生存。
This has generally been thought of as a symptom-and as support for the infection theory of the syndrome. But perhaps it is the cause.
人们普遍这种症状支持了慢性疲劳综合征的感染理论，可是，它也可能就是病因。
Not only have they found a specific genetic signature that indicates viral infection, but the team has concluded that viruses and bacterial infections trigger different genes.
他们的团队不仅发现了标志病毒感染的特殊基因信号，而且得出了病毒和细菌感染能够触发其他基因变化的结论。
Adenoids trap bacteria, but they're also prone to swelling and infection.
腺样体可以防止细菌入侵，但也很容易肿大和感染。
Monkeys are susceptible to infection but are not considered plausible reservoir hosts as virtually all infected animals die too rapidly to sustain survival of the virus.
猴易感染这两种病毒，但不认为猴是可能的宿主，因为实际上所有感染这两种病毒的动物都迅速死亡，很难维持病毒的生存。
Recovery from infection by one provides lifelong immunity against that virus but confers only partial and transient protection against subsequent infection by the other three viruses.
感染一种病毒并恢复后，对该病毒具有终生免疫，但对此后感染的其他三种病毒只有部分和短暂免疫力。
The scientists found that the protection was not enough to prevent infection but meant that the resultant illness was less likely to be severe.
科学家发现，防止感染的保护措施是不够的，但是因而发生的疾病也不会很严重。
Infection is usually acquired in childhood, but the painful and profoundly disfiguring visible manifestations of the disease occur later in life.
丝虫病感染通常发生在童年期，但疼痛和严重畸形症状出现在成年期。
The HIV virus not only infects through blood, but also through tissues and cells, the chances of infection are 100 percent.
HIV病毒不仅通过血液传播，而且还通过组织、细胞传播，感染的可能性是100%。
No information on possible exposure to diseased birds as the source of her infection is presently available, but an investigation is under way.
目前尚未获得关于可能接触病禽作为其感染源的信息，但是正在进行调查。
Be aware of the early clinical signs of H5N1 infection, but also understand that many other common diseases - of far less health concern - will show similar early symptoms.
了解H5N1感染的早期临床症状，但同时清楚，许多其它危害不大的常见疾病也会显示类似的早期症状。
People who had close contact with the woman have been placed under medical observation, but none have shown any sign of infection, officials said.
官员们表示，与患者有密切接触的人都已经处于医疗观察之中，不过目前还没有发现任何感染迹象。
White blood cells are key to fighting infection, but high levels can be a sign of inflammation, which is linked to coronary heart disease.
白血球是抵抗感染的关键因素，但高水准的白血球却是炎症的信号，会导致冠心病。
A toy might be harmlessly flushed out, but it might also perforate tissue, leading to bleeding or infection.
玩具可以无害地取出，当然也可以戳穿机体组织，导致出血或感染。
Overall infection rate is low, but high among people in their 20s-the most economically productive age group.
总体感染率较低，但在20多岁这一最具经济活力年龄组别人群中的感染率较高。
The child accompanied her mother to the traditional market where live poultry were sold but investigations into the source of infection are ongoing.
病儿曾与其母亲一道去过有活禽销售的传统市场，但感染源调查仍在进行之中。
This early period of infection represents the time of greatest infectivity but transmission can occur during all stages of the infection.
这一最初感染期感染性最强，但在各感染期都可能会传播艾滋病毒。
This early period of infection represents the time of greatest infectivity but transmission can occur during all stages of the infection.
这一最初感染期感染性最强，但在各感染期都可能会传播艾滋病毒。
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