In addition，the virus can mutate within an individual’s body，so that by the time it is transmitted to someone else, it has changed some of its characteristics．

此外，病毒可在人体内发生变异，到了传给别人的时候，已改变了其某些特征。

The process by which some microbes differentiate or mutate .

离异，分离变异一些微生物变异或经历突变的过程

The first microscopic organisms clearly associated with serious human disease (1867-68), the spirochetes mutate repeatedly, changing their antigens so that the host’s immunity no longer is effective, which produces the relapses.

首次以显微镜从人类相关重症中发现病原体(1867～1868)，回归热患者对致病螺旋体产生免疫时，新的变异型螺旋体又出现，引致症状回归。

To mutate or change morphologically,often reversibly.

突变，变异经受突变或形态上的改变，常为可逆地

Microbes proliferate rapidly．mutate frequently，and adapt with relative ease to new environments and hosts．

微生物繁殖迅速，经常变异，易于适应新环境和宿主。

Some viruses mutate fast enough to reinfect people after recovery (see influenza)or to keep the immune system from fighting them off.

有些病毒突变十分快速，在复原之后会再次感染，或让免疫系统无法击退它们。

Finally it has been suggested that the small numbers of micro-organisms that do survive irradiation might in time mutate to resistant forms and so pose greater hazards to food safety.

最后一种顾虑认为,少数在辐照后存活下来的微生物可能会及时转变为具有抵抗辐照的形式并对食品的安全构成更大的危害。

||1:An FCPA action is an ordeal.||2:Few firms dare risk going to court—only two cases against corporations have ever resulted in completed trials.||3:The vast majority of cases are settled, which can take years.||4:Listed companies must satisfy not only the Department of Justice, but also the Securities and Exchange Commission, which enforces the FCPA provisions requiring accurate records of all business dealings (to deter or detect illicit payments).||5:Before the department and the commission will sign off on a settlement, the company must satisfy them that the rest of its operations are squeaky clean.||6:Narrow investigations can mutate into broad ones that cost tens of millions of dollars.

||1:被FCPA指控的话，后果很惨痛。||2:很少企业敢冒险上法庭——企业被告的案例中只有两个结案了。||3:很多案子要用上几年时间才能结案。||4:上市公司不仅要达到司法部的要求，还要满足证券和交易委员会的要求，而这就使得FCPA要具备所有企业的交易记录（从而防止或者发现非法交易）。||5:在司法部和该委员会做出最终决定之前，企业必须让他们相信公司的其它运作也是没有猫腻的。||6:调查不充分会使案情变得更大，为此将付出成千亿美元。

||1:An FCPA action is an ordeal.||2:Few firms dare risk going to court—only two cases against corporations have ever resulted in completed trials.||3:The vast majority of cases are settled, which can take years.||4:Listed companies must satisfy not only the Department of Justice, but also the Securities and Exchange Commission, which enforces the FCPA provisions requiring accurate records of all business dealings (to deter or detect illicit payments).||5:Before the department and the commission will sign off on a settlement, the company must satisfy them that the rest of its operations are squeaky clean.||6:Narrow investigations can mutate into broad ones that cost tens of millions of dollars.

||1:涉及《反海外腐败法》的诉讼是极其折磨人的。||2:几乎没有一家公司敢于上法庭—历史上公司被起诉的案例中只有两例是完全结案的。||3:绝大多数案子的结果都是长达数年的调解。||4:上市公司不仅要使司法部满意，还要履行由美国证券交易委员会执行的《反海外腐败法》部分条款--对所有交易的如实记录（为了防止和发现非法支付）。||5:在司法部和委员会同意一项和解之前，公司必须保证其其他业务都绝对的干净。||6:一个小范围的调查都会变成耗费数千万美元的广泛调查。

||1: Nor, these days, are those mutations there by accident. They are, rather, deliberately induced, usually by exposing seeds to radiation. ||2: And that is exactly what Tomoko Abe and her colleagues at the Riken Nishina Centre for Accelerator-Based Science in Saitama, outside Tokyo, are doing with rice. ||3: The difference is that Dr Abe is not using namby-pamby X-rays and gamma rays to mutate her crop, as is the way in most other countries. ||4: Instead she is sticking them in a particle accelerator and bombarding them with heavy ions-large atoms that have been stripped down to their nuclei by the removal of their electrons. ||5: This produces between ten and 100 times as many mutations as the traditional method, and thus increases the chances of blundering across some useful ones.

||1:这些年的变异并非自然发生，而是常常通过将种子暴露于辐射下等方式引导发生的。||2:阿部知子和她的同事就在进行这一工作以培育大米。他们的工作地点位于东京外部的埼玉县仁科加速器研究中心。||3:不同之处在于他们没有像其他国家一样，利用纤弱的X射线和伽马射线来引发变异。||4:他们将种子放入粒子加速器，并用重离子对种子进行轰击碰撞。重离子是大原子去掉电子后只剩原子核的状态。||5:这一方法比辐射法的效果好十到一百倍，并且有用的种子不易被忽略掉。

Occasionally, though, the viruses that cause them mutate into something truly nasty.

不过引起这些疾病的病毒偶尔也会变异成异常凶险的东西。

Narrow investigations can mutate into broad ones that cost tens of millions of dollars.

调查不充分会使案情变得更大，为此将付出成千亿美元。

“The virus could still suddenly mutate , ” he told reporters.

“病毒任然可能突然的突变，”他告诉记者。

Was it necessary and productive to mutate 21st century American-style capitalism into a thinly disguised knock-off of the New Deal?

把二十一世纪的美式资本主义转变成包装潦草并且禁不住推敲的新政策是否必要而奏效？

Exposure to UV rays can mutate your cells and cause cancer.

暴露在紫外光下会使你的细胞突变，引起癌症。

“Influenza virus mutates remarkably rapidly so there is no doubt that the virus will mutate and evolve in humans, ” said Holmes.

病毒的变异非常快，因此病毒无疑会在人体中产生变异和演化。

One, by overexposing bacteria to antibiotics, you give bacteria a chance to mutate and become resistant.

第一，细菌过度感观抗生素时，你使得细菌有变异的可能性，并产生抗药性。

Vaccinating chickens against AI is costly, and because influenza viruses mutate rapidly, vaccination has to be repeated on a regular basis.

给小鸡接种抗禽流感病毒疫苗代价很高，因为病毒传播很快，疫苗必须一再的打。

Chemotherapy and radiation can cause cancer cells to mutate and become resistant and difficult to destroy.

化疗和放疗能够使癌细胞变异，也可以使其有抵抗力而难于毁灭。

Scientists are investigating, on a molecular level, how the virus might mutate to become capable of infecting people more easily.

科学家们这正在研究禽流感病毒变得更容易使人感染的分子机理。

Flu viruses mutate regularly and can develop resistance to drugs at any time.

流感病毒通常都有规律地变异，可以随时产生对药物的抗药性。

Flu viruses have the ability to change and mutate , making it difficult for drugs manufacturers to ensure effective vaccines are available.

流感病毒有变异和突变能力，这使得制药商难以保证疫苗的有效性。

Bacteria that are not killed entirely by an antibiotic will mutate and become resistant to it.

没有被抗生素完全杀死的细菌会突变并产生抗药性。

Let these alien cells grow and mutate , and see how they survive.

让这些特殊细胞生长并突变，观察它们如何生存。

It’s also been predicted that if these robots mutate and self-replicate, they might not know when to stop.

如果纳米机器人能够发生突变和自我复制，它们也许不清楚什么时候该停下来。

If we can shift the immune system to attack the conserved proteins instead, flu cannot mutate to escape without crippling its own machinery.

如果我们能够使免疫系统转为攻击保守蛋白，流感病毒就不能为逃避（免疫系统）而变异得同时还维持关键部位结构正常。

Such human body environment combined with outside invading bacteria, viruses, also easy to mutate .

如这人体中环境与外界入侵的细菌、病毒结合，还易产生变异等。

No woman developed it, but they were tested so often that the virus would have had little time to mutate .

虽然没有妇女产生耐药性，但这也与她们接受试验非常频繁致使病毒产生变异的可能性微乎其微有关。

He said he and his team have zeroed in on a section of a key protein in HIV’s structure that does not mutate .

他和他的小组人员已经解开了HIV病毒结构中不能发生变异的的一种关键性蛋白质的存在部位。

They say this may be because genes in the tumour’s own mitochondria have a tendency to mutate and degenerate.

他们说这个（利用宿主的线粒体）可能是因为肿瘤的自身线粒体内基因有变异和退化的趋势。