Pigeons are often seen as dirty birds and an urban nuisance, but they are just the latest in a long line of animals that have been found to have abilities to help humans.
人们常把鸽子视为肮脏的鸟类或是城市的公害，但他们只是众多有能力帮助人类的动物中的最新一员。
But he started — the pigeons started to think, effectively, what was it I did just before that last piece of corn came?
那些鸽子会想，上一粒谷粒掉过来之前我做了什么？
The answer is yes, but there is one catch.The catch is that no matter how the pigeons are placed, one of the pigeonholes must contain more than one pigeon.
回答是肯定的，但存在一个定式，即无论鸽子是怎样装入的，必然有一个鸽子洞要装入2个以上的鸽子。
If Skinner kept the focus on rats and pigeons and dogs, he would not have the impact that he did but he argued that you could extend all of these notions to humans and to human behavior.
如果斯金纳只是研究老鼠鸽子或是狗，他就不会拥有如此巨大的有影响力了，但他宣称，这些概念是可以应用到，人类以及人类行为中去的。
Pigeons and pollution are both common blights in cities around the world, but a group of engineers in London are hoping the birds can help them tackle problems with air quality.
对世界上许多城市来说，鸽子和污染问题都是常见的危害，但伦敦的一群工程师却希望能利用鸽子来帮助解决空气污染问题。
But the disturbing fact is many such wild animals are killed cruelly for food; animals such as pigeons, snakes, frogs, ostriches and even some endangered species.
而令人痛心的事实是许多这类野生动物被当作食物而被杀，例如：鸽子。蛇。青蛙。鸵鸟，甚至还有一些濒临灭绝的种类。
But on cloudy days, the pigeons with magnets could not find their way.
但是在乌云密布的日子里，带有磁铁的家鸽就会迷路了。
People like the pure white pigeons, but not all the pigeons in the world are white.
人们喜欢纯白色的鸽子。但是并不是所有的鸽子都是白色的。
Dead pigeons and a dead dog lay on the ground but there had been no mention at that point of any civilian casualties.
地面上有一些鸽子的尸体，还有一条狗的尸体，在那时没有提及任何平民伤亡的事情。
But these new findings suggest that pigeons don't always play it safe.
但是新的研究表示鸽子并不会总是谨慎行事。
Sending letters by pigeons is not a good way, but it is better than nothing.
用鸽子来送信并不是很好的方式，但是有总比没有好。
Pinhurst is only five miles from Silbury, but Mr. Scott cannot get a telephone for his new garage, so he has just bought twelve pigeons.
平赫特离锡尔伯里只有5英里，但詹姆斯.斯科特先生未能为他新的汽车修理部搞到一部电话机，所以他买了只鸽子。
But my favorite, or pure pigeons.
不过我最喜欢的，还是纯洁的鸽子。
"But once homing pigeons have flown a journey more than once, they home in on a habitual route home, much as we do when we are driving or walking home from work, " said Guilford.
燨“但是，信鸽一旦多次飞行同一条路线时，它们就会沿着习惯的路线回家，就像我们从单位开车或走回家一样。” 吉尔福德说。
Pigeons, it turns out, are no slouches either. It was known that they could count. But all sorts of animals, including bees, can count.
事实证明，鸽子的智力也不赖。它们会数数，这是尽人皆知的事实。但很多种动物，包括蜜峰，也会数数。
Know affiance No offense against pigeons but they seem , in their current numbers , such an unnecessary bird, he says.
没有对鸽子的攻击但是他们认为在现有的数量，鸟是不需要的。他说。
Pigeons will work for small immediate rewards but slack off for a larger reward that requires more work.
鸽子在微小的短期回报下表现积极，而在需要更多努力的长期回报下，尽管回报更大，仍然会表现懈怠。
But on very overcast days those clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions.
可在乌云蔽日这时那些生物钟已经改变了的信鸽在沿正确的方向起飞前行方面仍像正常的鸽子那样，做得非常好。
Pigeons and pollution are both common blights1 in cities around the world, but a group of engineers in London are hoping the birds can help them tackle problems with air quality.
对世界上许多城市来说，鸽子和污染问题都是常见的危害，但伦敦的一群工程师却希望能利用鸽子来帮助解决空气污染问题。
Most pigeons will eat cereals, but very few are doomed to create history.
大部分鸽子只会吃谷物，极个别却注定要创造历史。
I know a lot of people don't like pigeons, but I do!
我知道许多人不喜欢鸽子，我却很喜欢。
Therefore, it needs very good skills and high class of cameras as well. I took lots and lots of pics of pigeons in flight, but there are few satisfactory ones.
要想拍摄鸽子飞行的清晰照片需要高超的摄影技巧，另外对相机的要求也很高。
But on very overcast days those clock-shifted pigeons are just as good as normal pigeons in starting out in the right directions.
可在乌云蔽日这时那些生物钟已经改变了的信鸽在沿正确的方向起飞前行方面仍像正常的鸽子那做得非常好。
The weight of 3 co-nesting pigeons and non-nesting pigeons is similar, but the repayment of fodder evidently increases(P<0.01).
并窝3只的乳鸽体重增长与非并窝的乳鸽相似，但饲料报酬明提较高，重料比差异极显著（P<0.01）；
But anyway, he did a famous experiment with pigeons which, in the 1940s -1948 -in which he induced strange behavior patterns in pigeons by the following simple experiment.
他做过一个著名的鸽子实验，在19世纪40年代，是1948年，他用一个简单的实验，诱发了鸽子的强烈行为。
But anyway, he did a famous experiment with pigeons which, in the 1940s -1948 -in which he induced strange behavior patterns in pigeons by the following simple experiment.
他做过一个著名的鸽子实验，在19世纪40年代，是1948年，他用一个简单的实验，诱发了鸽子的强烈行为。
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