As populations grow, food becomes a problem.
随着人口的增长，食物成了一个问题。
It can also be exploitative, especially when used with vulnerable populations.
它也可以是剥削性的，特别是用于弱势群体的时候。
The herbicide might damage populations of certain rare plant species that the lake contains.
除草剂可能会破坏湖泊中某些稀有植物的种群。
In the absence of wolves, coyote populations also grew quickly.
在没有狼的情况下，土狼的数量也迅速增加。
Should people take action to control the growing deer populations?
人们应该采取措施控制鹿的数量吗？
After that, a few small populations left Africa to populate the rest of the world.
在那之后，少数人离开非洲，移居到世界其他地方。
Populations are also being diverted.
不少人口也已被迁移。
This enables them to develop large populations.
这让他们能够保持的很大的种群数量。
When populations change, social change follows.
当人口发生变化，社会变化紧随其后。
Now few, if any, pure native populations remain.
而如今，如果还有的话，也只有很少的纯种本土灰鸭种群还在继续存在。
Today we live in cities with huge populations.
今天我们生活在人口众多的城市。
Most rich countries have rapidly ageing populations.
多数富裕国家拥有快速老龄化的人口。
If wildlife populations crash, it will be too late.
如果野生动物数目减少，那就会太晚了。
Eventually, you have to look at natural populations.
最终，人们需要根据现实人口来决定。
South Georgia's king penguin populations too are soaring.
南乔治亚的王企鹅数量也剧增。
Conservationists also continue to monitor bat populations.
环保人士也继续监测蝙蝠数量。
The question is whether populations would put up with this.
问题在于民众是否能容忍这种后果。
This is not a healthy situation - for populations or world security.
对全体人口或世界安全而言，这不是一个正常的形势。
In the cold war, the foes were both big countries with big populations.
在冷战时期，敌对双方都是拥有巨大人口的大国。
But the good news is we have also found that tiger populations can recover.
不过好消息是我们也发现老虎的种群数量是可以恢复的。
Culturally appropriate to avoid the risk of offence to local populations.
符合文化习惯，以避免冒犯当地居民。
Culturally appropriate to avoid the risk of offence to local populations.
符合文化习惯，以避免冒犯当地居民。
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