They were forced to practise cannibalism in order to survive.
为了生存，他们被迫同类相食。
The recession has weakened so many businesses that many can no longer survive.
经济衰退削弱了很多企业的实力，以至于很多无法再生存下去。
The rag trade is extremely competitive, and one needs plenty of contacts in order to survive.
服装业竞争极为激烈，要想生存就要有足够的关系。
In the United States small bookstores survive quite well. The same applies to small publishers.
在美国小书店生存得很好。小出版商也是一样。
On the one hand, if the body doesn't have enough cholesterol, we would not be able to survive. On the other hand, if the body has too much cholesterol, the excess begins to line the arteries.
一方面，如果身体没有足够的胆固醇，我们将无法生存；另一方面，如果体内胆固醇过多，多余的胆固醇就开始让动脉变厚。
How did diatoms survive if zinc is so scarce?
如果锌如此缺乏，硅藻是如何生存的呢？
That's one of the reasons that shrubs survive in the Arctic.
这是灌木能在北极生存的原因之一。
So how long can a gene survive in a species if it is no longer used?
那么，如果一个基因不再被使用，它能在一个物种中存活多久呢？
It seems to me that something has to be done, if we're to survive as a country.
在我看来，如果我们要作为一个国家生存下去，就必须做点什么。
Born and raised in a zoo, these animals would not be able to survive in the wild.
在动物园出生和长大的这些动物无法在野外生存。
Plants and animals from the Mesozoic era were unable to survive in the Cenozoic era.
中生代的动植物在新生代无法生存。
"Regions of outward migration allow planets and planetoids to survive, " Mac Low said.
麦克·劳说：“向外迁移的地区使行星和小行星得以生存。”
If an infant does not cry out, it is unlikely to get the attention it needs to survive.
如果婴儿不哭闹，就不太可能得到维持生存所需的关注。
If we wish to survive in either for any length of time, we need to have mechanical aids.
如果我们想在其中任何一种环境中生存一段时间，我们都需要机械辅助。
Researchers suggest that humans would only survive for four years if the bees disappeared.
研究人员认为，如果蜜蜂消失了，人类就只能存活四年。
Most people with only one copy of the gene—"carriers"—survive and pass the gene to offspring.
大多数只有一个基因拷贝的人——“携带者”——能够存活下来并将基因传给后代。
Since sheep and cattle can't survive harsh climates, they needed to be taken south every winter.
由于牛羊不能在恶劣的气候条件下生存，每年冬天都要把它们带到南方去。
Plants, insects and animals continue to survive and thrive even after a specific species disappears.
即使在一个特定物种消失后，植物、昆虫和动物仍然继续生存和繁衍。
Once an oak tree becomes established, it is likely to survive minor cycles of drought and even fire.
一棵橡树一旦长成，就有可能在干旱甚至火灾的小周期中存活下来。
Currently there's no public policy on using assisted migration to help species survive climate change.
目前还没有公共政策在利用协助移徙来帮物种在气候变化中存活。
To survive in that sort of environment, animals have to adapt to evolve in response to their surroundings.
为了在那样的环境中生存，动物必须进化，以适应周围的环境。
This raises unique challenges for Arctic wildlife and indigenous people who depend on Arctic ecosystems to survive.
这对依赖北极生态系统生存的北极野生动物和土著居民提出了独特的挑战。
They survive by hustling on the streets.
他们靠沿街兜售为生。
The organisms were forced to adapt in order to survive.
生物被迫适应，以求生存。
He will have to make major adjustments to his thinking if he is to survive in office.
他要想继续任职的话，就得对他的思维方式作大的调整。
Natural selection ensures only the fittest survive to pass their genes on to the next generation.
物竞天择确保只有最适应环境的物种才得以生存下来，把基因传递给下一代。
We saw his dependency on his mother and worried that he might not survive long if anything happened to her.
我们看到他对母亲的依赖，担心万一她有个闪失，他也会活不长。
Would you starve yourself to help it survive?
你会饿着自己来帮助它生存吗？
They can survive a long time without food, too.
它们也能在没有食物的情况下存活很长时间。
Nature can often give them everything they need to survive.
大自然常常能给予他们生存所需的一切。
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