Once destroyed, brain cells do not regenerate.
脑细胞一旦遭到破坏，就不能再生。
Global financial confidence, once destroyed, requires myriad positive events and a heavy convergence of them to counter ambient pessimism and gloom.
全球金融信心一旦遭到破坏，就需要有无数的正面事件大量集中发生，才能抵御周围的悲观与沮丧情绪。
Afier all the reasons given by people for supporting traditional energy, one should be mentioned that the environment on the earth is unrecoverable once destroyed.
在人们给出了所有支持传统能源的理由之后，我们应该注意到，地球上的环境一旦被破坏就无法恢复了。
Anyone who is going to build factories here should place the environmental protection before everything else, since the scenery here, once destroyed, is hard to recover.
任何打算在这里建厂的人都应把环境保护放在首位，因为这里的风景一旦被破坏，就很难恢复。
I know one secret weapon they have; their God is all-powerful--he destroyed us once, and he might again.
我知道他们拥有的秘密武器；他们的信仰非常强大，可以一次又一次地毁灭我们。
Once a sheet was used to encode a message, it was torn off the pad and destroyed.
一旦便笺被用于编码信息，它就会从便笺簿上被扯下来销毁。
"But the pigments they once contained do, courtesy of their copper heart - even after the melanosome containing them has been destroyed," he told BBC Nature.
“但是这些曾经含有的色素会留下铜原子中心——即使包含它们的黑素体被破坏了。”他对BBC自然频道说。
Once a biological sample was obtained, its use must be limited to generating a DNA profile only, and afterward the sample would be destroyed.
生物样本获得以后，只能用于录入DNA档案，之后样本必须销毁。
If certain critical areas of the cortex-broca's area, for instance-are destroyed by stroke or tumor, the patient will probably never recover the function once performed by the now silent circuits.
如果特定的关键区域的皮质——例如：布洛卡区——被中风或肿瘤破坏了，病人将可能无法恢复以前由无声的电路进行的功能。
Once these cells are destroyed, the pancreas can no longer produce sufficient amounts of insulin for the body’s needs.
一旦这些细胞被破坏，胰腺就不能再产生足够的胰岛素来满足身体的需要。
The consequences are not trivial: he has destroyed the economy of a once prosperous country and caused a mass exodus of its people.
引发的结果也是令人惊诧的：他破坏了曾经繁荣一时的经济而且迫使国民大量外出。
Once enemy air defenses have been destroyed, F-18s and other non-stealthy aircraft would presumably operate on more equal terms with stealthy aircraft.
只要敌人的防空系统被摧毁，F-18系列战机和其他非隐形飞机就可以发挥与隐形战机同样的作用。
Once the sensitive cells deep in the ear that convert sound waves to electrical impulses are destroyed by loud noise, they cannot be restored.
人耳深处都有敏感细胞，他们负责将声波转化成脑电流，一旦这些敏感细胞受到损伤，要想恢复很难。
Such transformers can take a long time to replace, especially if hundreds are destroyed at once, said Baker, who is a co-author of a National Research Council report on solar-storm risks.
这样的变压器更换起来花费时间，尤其是如果数百台一同遭到毁坏，贝克尔说，他是国家研究委员会报道太阳风暴危机的作者之一。
Once he is excessively dependent on the remuneration, he might lessen due inquiry and counterviews from the managerial personnel, and consequently, his independence might be destroyed.
而一旦他过分地依赖薪酬，他可能会降低对管理层行为的质疑，结果会导致他的独立性降低。
The regional landscape is? At and was once rich in wet-lands and salt marshes that have been mostly destroyed by decades of urban development.
当地的地势平坦，曾经富饶的湿地和盐碱的沼泽，均毁于近几年的城市化。
Once the cell’s anticancer defenses are destroyed, genetic mayhem ensues, with further mutations and wholesale rearrangements of DNA in the chromosomes.
而一旦细胞的抗癌防御系统被摧毁，遗传混乱就会随之而来，于是又进一步加剧了基因突变的程度，而且染色体中的DNA将产生大规模重组。
Once the great important structure, such as high building, high dam undergo destroyed, the effect will be quite serious.
高层结构、高拱坝等重大建筑结构一旦遭受破坏，后果将相当严重。
Once the Glyph is placed, it retrieves charges and can be destroyed but does not possess any effect, block any line of sight, or induce any movement.
一旦雕文被放置，雕文将获得充能，并可以被破坏，但此时雕文并没有任何效果，不能阻挡视野，以及阻碍移动。
With the rapid growth of human population, much space once belonging to wildlife has been either occupied or destroyed in the process of industrialization and urbanization.
随着人口的快速增长，在工业化和城市化的过程中，曾经属于野生动物的空间被人类占据或者破坏了。
A transient cookie is like any other with the exception that it is destroyed once the user disconnects from the server or is inactive for some preset time.
瞬时cookie除在用户断开与服务器的连接时被破坏或在某一段预设的时间内不活动之外，与其它的cookie是一样的。
No, but my father's car was destroyed in a flood once. It actually happened the day after he bought the car!
没有，但是我父亲的车有一次在洪水中被损坏了。实际上那发生在他买了车的第二天。
Once the demon is banished or destroyed, I will return the power you have lent me… until next encounter.
只要恶魔被我放逐或是摧毁了，我就会归还你们借给我的力量…直到下一场战斗。
Once the demon is banished or destroyed, I will return the power you have lent me… until next encounter.
只要恶魔被我放逐或是摧毁了，我就会归还你们借给我的力量…直到下一场战斗。
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