一种判断的方法是测量它们前肢的骨头。
One way to tell is by measuring the bones of their forelimbs.
他与这个蝎尾怪兽扭打着，不让它螳螂般的前肢夹住他。
He grapples with the manticore, keeping its mantis forelimbs from locking onto him.
翼龙的每个前肢都有一根长长的第四指，支撑着像翅膀一样的膜。
In pterosaurs a greatly elongated fourth finger of each forelimb supported a wing-like membrane.
也许其中一些祖鸟会爬树，但是没有令人信服的分析证明始祖鸟是如何用它的前肢既爬又飞的。
Perhaps some of them could climb trees, but no convincing analysis has demonstrated how Archaeopteryx would have both climbed and flown with its forelimbs.
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。
Even rudimentary feathers on forelimbs could have expanded the arm's surface area to enhance lift slightly.
我注意到他后肢向右偏的方式，从不与前肢在一条线上，却始终有理想的节奏。
I noticed the way his hindquarters shifted over to the right, never in line with the front, yet always in perfect rhythm.
翅膀是由前肢为适应飞行需要演变而来的。
前肢，上肢动物前部的附肢，如前腿、前翅、前鳍等。
左前肢用受体血浆冷冻处理的同种异体神经缝接于神经缺损处。
The nerve of the left side was bridged with nerve allograft cryopreserved in recipient plasma.
正是因为袋鼠前肢很短而后肢又很长，所以它们才能跳得又快又远。
So, because they have short forelimbs and long hindlimbs, they can jump easily, quickly and for long distances.
袋鼠用后脚起跳，用前肢和尾巴着地，然后用他们的后肢推动再次跳起。
Taking off on their hind feet, landing on their fore limbs and tail, pushing off again with their hind limbs.
对龙翼的描述基本上有两种-一对连接在脊椎上的第三肢，或者是蹼状的前肢。
Dragon wings are usually depicted in one of two ways-a third pair of limbs connected to the backbone, or webbed forearms.
这种转变包括从用前肢划水到身体波动再到尾巴摆动，就像现代鲸鱼的水平尾鳍。
This transition to living in the sea involved changes from paddling with limbs to undulating the body to oscillating a tail, such as the horizontal tail flukes in modern whale species.
目的研究家兔前肢仅太阴经五腧穴：少商、鱼际、经渠、太渊和尺泽的层次结构。
Objective To study the structure of the Five Shu points: Shaoshang, Yuji, Jingqu, Taiyuan and Chize of the Taiyin meridian in rabbit's forelimb.
袋鼠的前肢看似未完全发育，但其有力的五趾前足非常善于佯装攻击和击打动作。
The kangaroo's forearms seem undeveloped but the powerful five-fingered hands are skilled at feinting and clouting.
肘部周围的手术可使用无菌气囊止血带，在应用前肢体可先进行皮肤消毒、铺单。
Sterile pneumatic tourniquets are available for operations about the elbow, and the limb may be prepared and draped before the tourniquet is applied.
研究人员最初认为，顾氏小盗龙从身体两侧伸展出前肢与后肢，形成两对滑行翼。
Researchers originally suggested that Microraptor spread both arms and legs to the sides of its body to form two pairs of gliding wings.
尔后，前肢进化成可以上下拍动的翅膀，于是它们又从滑翔者转型成为真正的飞行家。
Only later might their arms have evolved into wings they could push up and down, transforming them from gliders to true powered fliers.
我注意到它后肢向右偏的方式，总不会和前肢在一条线上，却始终保持着理想的奔跑节奏。
I noticed the way his hind quarters shifted over to the right, never in line with the front, yet always in perfect rhythm.
很多长有羽毛的恐龙因为没有翅膀，或相对于长毛的前肢来说身体过于沉重，因此也无法飞行。
Many feathered dinosaurs did not have wings or were too heavy, relative to the length of their feathered limbs, to fly.
当狗以慢速小跑，面对裁判走来时，可以观察到前肢很直，足爪在地面的落点非常靠近。
When the dog is moved at a slow trot towards an observer, its straight front legs track comparatively close together at the ground.
当狗以慢速小跑，面对裁判走来时，可以观察到前肢很直，足爪在地面的落点非常靠近。
When the dog is moved at a slow trot toward an observer its straight front legs track comparatively close together at the ground.
日本鼯鼠的头部、前肢、后肢还有尾巴都有皮膜相连，这使得它可以在树与树之间滑翔。
The head, front legs, hind legs, and tail of the Japanese flying squirrel are connected by a membrane of skin, which allows the squirrel to glide from tree to tree.
但是，这项新的研究表明，恐龙可能用前肢来帮助它们快速移动、维持平衡以及保持灵活。
But this new research shows dinosaurs may have used their forelimbs to help with quickness, stability and agility.
一些研究者认为羽毛恐龙是从零开始进化出飞行能力的，它们在奔跑中会拍动自己带羽毛的前肢。
Some scientists argue that feathered dinosaurs evolved flight from the ground up, flapping their feathered arms as they ran.
一些研究者认为羽毛恐龙是从零开始进化出飞行能力的，它们在奔跑中会拍动自己带羽毛的前肢。
Some scientists argue that feathered dinosaurs evolved flight from the ground up, flapping their feathered arms as they ran.
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