一只鸟，通过唱歌，可能会失去原本可以花在其他重要行为上的时间，比如觅食或休息。
A bird, by singing, may forfeit time that could otherwise be spent on other important behaviors such as foraging or resting.
但是，通过旋转鸟笼内部（鸟在里面）或者旋转充当背景的外墙，餐盒与周围环境的相对位置可能会发生改变。
However, food boxes' position with respect to the surroundings could be changed by revolving either the inner cage containing the birds or the outer walls, which served as the background.
通过对鸟群几十年的研究，研究人员预测，那些更容易受伤的、睡眠时处于队列末端的鸟会格外警觉。
Decades of studies of bird flocks led researchers to predict extra alertness in the more vulnerable, end of the row sleepers.
人们怎么能通过鸟的腿来区分它们呢？
How could anyone tell differences among birds by their legs?
在这样的地方赤潮容易形成，有些会产生毒素，毒素通过贝壳动物进入食物链，并且增多而杀死较大的鱼(如果还有任何剩下来的话)、鸟，甚至海豹和海牛。
In such places red tides tend to form, some producing toxins that get into the food chain through shellfish and rise up to kill bigger fish (if there are any left), birds and even seals and manatees.
简单的说，它是通过动物的粪便侵入到食物中的，比如奶牛、鸟、老鼠的粪便。
Simply put--it gets into food through the poop of animals, such as cows, birds, and mice.
它们通过复杂的鸣声二重奏来显示其合作的强大，以此捍卫领地不受其他蚁鸟的侵犯。
They defend their territories from other antbirds by singing complex duets to signal their combined strength.
“鸟与鱼系列”装置中有两部动态机械轮椅，它们之间能通过动作和文字进行“交流”，而文字由嵌入式打印机打印出来。
“The Fish-Bird Series” includes two robotic wheelchairs that “communicate” through movement and written notes, which are generated by embedded printers.
通过研究33个不同巢穴院子中装饰品的大小和位置，Endler发现雄性园丁鸟会将它们按照大小顺序进行仔细的排列。
By measuring the size and position of ornaments that were displayed on 33 different bower courts, Endler found that in all cases the males had carefully laid them out in order of increasing size.
鸟、乌龟甚至细菌都是通过地球磁场线来定位的。
Birds, turtles and even bacteria Orient to the earth's magnetic field lines.
上个月，因弗内斯城的小学生们发现一只一直关注的红风筝鸟停止了运动——他们将卫星定位装置绑在一只鸟腿上，并通过英特网观察鸟的飞行。
Last month primary-school children in Inverness became concerned when a red kite-whose movements they had been watching over the Internet via a satellite-linked tag on the bird-stopped moving.
与此同时，我还继续担当一些委员会的代表并通过业余时间的学习去获得硕士学位。我努力享受着每天看到的每一棵树每一只鸟，与家人和朋友在一起的每一个时刻。
In the meantime, I sit on some committees and study part time for a masters degree, and I make an effort to enjoy every bird and tree I see, and every moment with family and friends.
为了使所有的己方能在线上占优势，特别是中单的英雄，你们的一个辅助英雄必须通过他的第一笔资金把鸡升级为鸟，。
One of your support heroes must upgrade chicken to crow with his first money in order for all players to dominate their lane, especially the solo hero.
在鸟类中也有同样的肌肉，在冬天它使得鸟的羽毛膨胀，以达到御寒的目的。哺乳动物也通过毛发来御寒。
The same muscles puff up the feathers of birds and the fur of mammals on cold days to help keep them warm.
对于一个狂热的观鸟爱好者，没有什么能比看到一只没见过的或者罕见的鸟、或者是学会通过特征区分各个鸟种更令人激动的了。
For an enthusiastic birder, nothing is more exciting than spotting a new or rare bird, or learning to distinguish individual birds through their personalities.
因此想给雄性食米鸟上地理定位器标牌的研究人员通过播放雄鸟的叫声抓住它们，那声音听起来像《星际大战》成名机器人R2-D2的啾啾声。
So researchers who want to tag males with geolocators catch them by playing a recording of a male's call, which to human ears sounds like the chirps of R2-D2, the robot of Star Wars fame.
雄性天堂鸟不但拥有奇妙多彩的羽毛，它们还会通过舞蹈，摆造型甚至完全改变自己的外形来博取雌性(雌性天堂鸟往往不那么漂亮)的欢心。
Not only does the male Bird of Paradise have fantastic colorful plumage, he dances, poses and completely changes his shape to woo the less exotic-looking females.
这里有几个想法：通过国际鸟类营救研究中心收养一只棕色的鹈鹕，这只鸟能从海水中拣起被油浸透的鸟，并为它们清洗和重新为它们找到栖息地。
Here are a few ideas: Adopt a Brown Pelican through the International bird Rescue Research Center, which picks up oiled birds, cleans and rehabilitates them.
知更鸟可能不是当地数量最多的鸟类，但是对蚊子来说，它们的血就是美味佳肴，通过不断地吸血，鸟成了这个病毒的超级携带者。
Robins may not be the most abundant of birds, but mosquitoes find their blood particularly tasty, frequently feeding on them and turning them into viral "super-spreaders."
研究者通过对包裹化石的沉积层进行放射性元素年代测定，推断出中华龙鸟生活在1.25亿年前。
It lived around 125 million years ago, based on the dating of radioactive elements in the sediments that encased the fossil.
通过保持一定量的人为接触去饲养带铭印的鸟。
Rearing by imprinted birds with a certain amount of human contact.
很多动物是西尼罗河病毒的宿主，但该病毒主要还是通过当地的一些蚊子来传播，这些蚊子是知更鸟的食物，鸟吃了蚊子，自然也变成宿主了。
A variety of animals can serve as hosts for West Nile, but the virus primarily spreads through a few species of mosquitoes that usually feed on birds, and those bird species, which become viral hosts.
通过捕食野猪、鹿、鸟、海龟、水豚、凯门鳄、甚至美洲虎，它们可以达到其巨大的体型。
They reach their monumental size on a diet of wild pigs, deer, birds, turtles, capybara, caimans, and even jaguars.
通过体形的大小和形状特别的尾巴，可以容易地认出这是只什么鸟。
This bird is easily recognized from its size and the unusual shape of its tail.
刚孵化的布谷鸟还看不见东西，也没有羽毛，它们的背上有一个特殊的凹陷，就像一个酒窝，通过这个凹陷，它们就可以一个一个地把自己的同伴幼鸟背负出鸟巢。
The just-hatched cuckoo, still blind and featherless, has a special hollow like a dimple on its back, so that it can hump out of the nest, one by one, its companion fledglings.
通过模仿鸟的飞行可以学到很多飞行方面的技术，但无法学到其精确的分辨能力。
Much can be learned about flying in an attempt to imitate the bird, but also when differentiating from its exact behavior or appearance.
尽管模仿鸟可以极好的模仿很多鸟的歌声，尽管如此还是可以通过听觉线索来辨认出是模仿鸟。
Although th mockingbirds superbly mimic the songs and calls of many birds, nonetheless they can also be quickly identified mockingbirds by certain aural clues.
如果您使用的是木头，你将需要用金属丝网覆盖它，以防止鸟通过咀嚼逃跑。
If you use wood, you'll need to cover it with wire mesh to prevent the bird from chewing through it.
如果您使用的是木头，你将需要用金属丝网覆盖它，以防止鸟通过咀嚼逃跑。
If you use wood, you'll need to cover it with wire mesh to prevent the bird from chewing through it.
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