The bird ruffled up its feathers.
这只鸟竖起了羽毛。
The female sat on the eggs, fluffing out her feathers.
母鸟抖开羽毛孵蛋。
The bird fluffed its feathers.
鸟啄羽毛，使之抖松。
The bird puffed up its feathers.
那只鸟膨起了它的羽毛。
You won't ever find feathers on a mammal or gills on a primate.
你在哺乳动物身上找不到羽毛，在灵长类动物身上找不到腮。
Thor Hanson's new book takes on the intriguing subject of feathers.
托尔汉森的新书选择了一个有趣的主题：羽毛。
If it's sitting on a vertical branch, it'll groom its breast feathers.
如果它坐在垂直的树枝上，它会梳理胸脯的羽毛。
The most common materials used for nests are grasses, branches and feathers.
筑巢最常用的材料是草、树枝和羽毛。
Humming bird's feathers are mostly very bright and shine with metallic luster.
蜂鸟的羽毛大多十分鲜艳，并且闪耀着金属的光泽。
Its old and heavy wings with thick feathers on its body make it difficult to fly.
它又旧又重的翅膀上长着厚厚的羽毛，这使它很难飞行。
In the twinkling of an eyelid, the Cat leaped on him, and ate him, feathers and all.
眨眼间，那只猫跳到他身上，把他连羽毛都吃掉了。
He would weave dry grass and reeds into small nets, stuffing them with feathers and moss.
他会把干草和芦苇编织成小网，再用羽毛和苔藓把它们填满。
Although birds use their feathers for flight, some of their feathers are for other purposes.
虽然鸟类用羽毛飞行，但有些鸟类的羽毛还有其他用途。
In birds the second finger is the principal strut of the wing, which consists primarily of feathers.
鸟类的第二根手指是翅膀的主要支柱，翅膀主要由羽毛组成。
She showed him the feathers that they had dropped into the courtyard, and which she had gathered up.s
她把羽毛拿给他看，羽毛是他们掉在院子里的，并且是她拾起来的。
As feathers became larger over time, flapping flight evolved and birds finally became fully air-borne.
随着时间的推移，羽毛变得越来越大，扑翼飞行逐渐发展，鸟类最终完全可以在空中飞行。
Larger feathers could have increased lift incrementally, until sustained flight was gradually achieved.
较大的羽毛可以逐渐增加升力，直到逐渐实现持续的飞行。
It was the biggest crow she had ever seen, plump and sleek, with rainbows shining in its black feathers.
这是她见过的最大的一只乌鸦，它丰满而且光滑，黑色的羽毛闪烁着彩虹般的光芒。
For example, the ostrich has plumage that is so constructed that the feathers are long but not too dense.
例如，鸵鸟的羽毛构造使它的羽毛长而不密。
In that case, the parent will save its best performances until just before the babies get their feathers.
在这种情况下，父母会把自己最好的表现保留到孩子即将长出羽毛的时候。
Even rudimentary feathers on forelimbs could have expanded the arm's surface area to enhance lift slightly.
即使是前肢发育不全的羽毛也能扩大手臂的表面积，以略微提高升力。
The displacement activity, the grooming, the straightening of its feathers, seems to be an irrelevant behavior.
替换活动，如梳理、拉直羽毛，似乎都是无关的行为。
A group of colorful wild animals will spring to mind: a parrot's rainbow feathers or the showy scales of sea fish.
你会想到一群色彩斑斓的野生动物：鹦鹉的彩虹羽毛或海鱼的艳丽鳞片。
The beetle larvae have a distinct chemical make-up, which can be traced through the feathers and blood of birds that eat them.
甲虫幼虫含有独特的化学成分，从猎食它们的鸟类的羽毛和血液中可以找到这种成分的痕迹。
If the "fuzz" on some pterodactyls is indeed confirmed to be feathers, the origin of feathers can be traced back to more ancient times.
如果某些翼手龙身上的“绒毛”被证实的确为羽毛的话，那羽毛的起源就可以上溯到更为远古的年代。
The find helps cement the dinosaur-bird connection, but it also casts new light on the mystery of why nature invented feathers in the first place.
这一发现有助于巩固恐龙和鸟类之间的联系，但它也为自然界最初为什么会产生羽毛这一谜题提供了新的线索。
It had massive legs, taloned claws, and a long, powerful neck. Its body was covered in bristling, hair-like feathers, and its beak resembled a spear.
它有着粗壮的腿、利爪及长有力的长脖子。它的躯干覆盖着毛发状的羽毛，它的喙就像一个长矛。
From there on, the remaining chapters are captivating natural history, arranged in neatly named sections: "fluff", how feathers keep birds warm and dry.
从那开始，剩下的章节都是引人入胜的自然史，以巧妙命名的章节排列：“绒毛”，羽毛如何让鸟类保持温暖而干燥。
The team made a skeleton, covered the bones with a clay body, and added plumage made of pheasant feathers trimmed to match impressions preserved in fossils.
团队制作了一个骨架，骨架上覆盖着和骨头和粘土肉体，再添加上翅膀，翅膀是由雉鸡羽毛制作的，羽毛经过修剪来符合化石中保留的印记。
The sparse distribution of the feathers, however, also allows considerable lateral air movement over the skin surface, thereby permitting further heat loss by convection.
然而，羽毛的稀疏分布也使得皮肤表面形成相当大量的侧向空气流动，从而可以通过对流进一步散热。
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