The largest, oldest trees would progressively die off and tend not to be replaced.
最大、最老的树会逐渐死去，并且往往不会被取代。
Contraction of front and side parts as cells die off was observed in some subjects in their thirties, but it was still not evident in some sixty and seventy-year-olds.
随着细胞的死亡，有些人大脑前部和侧部的收缩，在三十多岁时就能观察到，但是也有些人直到六七十岁依然不明显。
Why did the fishes in the pond die off?
为什么池塘里的鱼都死了？
Without the gel, scientists say, the bacteria die off.
科学家说，如果没有这种凝胶，细菌将无法存活。
If its stem cells are eradicated, the rest of a tumour may die off.
如果癌症的干细胞被消灭了，其他的肿瘤组织或许会死掉。
Many will die off with the first frost whilst others hibernate until the following spring.
很多会在初霜之时死去，其他的则会蛰伏到来年春天。
When birds began to die off, People began to criticize the use of chemical pesticides.
当鸟类开始相继死去时，人们就开始对使用化学杀虫剂提出批评。
In doing so, the cancer cells die off naturally, without the need for harmful and expensive chemotherapy.
在这个过程中，癌细胞就会自然死亡，使患者不必经历对身体伤害极大又十分昂贵的化疗过程。
Many of the larger animals that were hunted by the early Indians began to die off with the end of the ice age.
随着冰河时期末期到来，印第安人捕杀的许多大型动物开始绝种。
It develops when the neurons known as Purkinje cells, located in the cerebellum of the brain, begin to die off.
该疾病因位于小脑中的浦肯野神经元细胞的死亡所引起。
Initial findings indicate poultry die off in the vicinity of the case's home in the week prior to the onset of illness.
初步结论表明在该病例发病前一周内，其住所附近有禽类死亡。
When insects can't get the right plants to eat and they die off, then the birds don't have enough bugs for their meals.
当昆虫无法得到适合的可食植物时便会死去，这样一来鸟类便没有足够的食物。
There have been reports of poultry die off in her village and the case is reported to have had exposure to sick poultry.
有报告称，病人所在的村庄有家禽死亡情况。据报告，病人曾与病禽有过接触。
There have been reports of poultry die off in her village and the case is reported to have had exposure to dead poultry.
有报告称，病人所在的村庄有家禽死亡情况。据报告，病人曾与病禽有过接触。
Wild sarsaparilla, wild oats, Solomon's seal and a host of understory plants die off; grass-like species such as Pennsylvania sedge take over.
野生撒尔沙、野生燕麦、玉竹和大量的林下叶层植物相继死光；宾夕法尼亚莎草之类的草类物种接管了领地。
Pollution from sewage or farm waste can cause excess algae growth, starving the water of oxygen and causing fish and other species to die off.
从下水道或者农场里出来的污染水引起藻类的过度生长，造成水里的氧气严重缺失，以至于鱼类和别的物种相继死去。
Based on previous extinctions, only nine species would have been expected to die off in the same time frame had it not been for mankind's involvement.
根据以往的物种灭绝情况，如果没有人类的参与，在同样的时间内只会有九种物种灭绝。
They cannot be destroyed, though their Numbers can be limited if the conditions in which they multiply are reduced, implying that they do die off eventually.
他们也不能被消灭，但是如果周围环境让他们无法繁衍生息，那么最终他们还是有灭绝的一天。
Researchers isolated two proteins, known as CCSA-3 and CCSA-4, that appear to be released into the bloodstream when some of the cancer cells in a tumor die off.
研究人员分离出两种蛋白命名为CCSA-3和CCSA-4，这两种蛋白似乎在肿瘤一些癌细胞死亡后被释放入血流。
As you close in on the point where the Atlantic meets the Indian Ocean the race will be almost over, the wind can die off leaving a nail biting finish to a 3,500 nautical mile race.
当你们逐渐靠近大西洋与印度洋的交汇处时，这个赛段的比赛就基本要完成了，风速逐渐消逝，3,500海里激烈的角逐马上就要结束了。
For some reason, people occasionally predict the same outcome from giving away software: Everyone will use the free software, but no one will contribute, and it'll die off from bitrot.
出于某些原因，人们有时会预测出关于白送软件的一个共同结果：所有人都使用自由软件，但是没有人会贡献，而最终它将消失。
When we take a species out of its native home and transport it elsewhere, it may face new challenges and die off, or it may find itself virtually unencumbered by constraining forces.
如果我们让一个物种离开原产地，运到别处去，那么在新环境中，这个物种可能会遭遇到新的威胁而相继死亡，也可能发现几乎没有任何一种可以制约自己的力量。
Humanity undergoes changes, albeit small, with every generation: If a trait is beneficial it will live on, while deleterious ones slowly die off. Here are some superhuman traits that have persevered.
人类经历着变化，尽管微小，却一代接这一代不停止：如果某一特征有益，则将继续存在，而有害的倾向则消亡。
Killing mechanism: atmospheric dimming, acid rain, crop die-off.
杀伤机制：大气能见度降低、酸雨、作物死亡。
The die-off was surpassed only by the gargantuan Permian extinction 250 million years ago.
只有2亿5000万年前史上空前的二叠纪大灭绝盖过这次灭绝。
The worst die-off has occurred in south-east Asia, where hunting, dam building and the conversion of forest to palm oil plantations and paddy fields has been most dramatic.
物种消失最严重的地方在东南亚，当地捕猎、建设大坝、毁掉森林建造棕榈油种植园、开发稻田等行为对生态环境的影响最大。
Bird and fish die-off from methane have shown these species are highly sensitive to methane poisoning.
鸟类和鱼类由于甲烷导致的大量死亡显示了这些物种对甲烷毒气的高度敏感。
Bird and fish die-off from methane have shown these species are highly sensitive to methane poisoning.
鸟类和鱼类由于甲烷导致的大量死亡显示了这些物种对甲烷毒气的高度敏感。
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