此外，尽管人类直立行走已经有数百万年的历史，我们的脚和背部仍在两足行走的姿势中艰难斗争，无法轻易承受过长的四肢持续施加的压力。
Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and cannot easily withstand repeated strain imposed by oversize limbs.
事实上他们已经造出100多只了，另外还有两只，一只有很短的四肢，一只长着腊肠犬一样的尾巴。
They've produced more than 100 of them actually, as well as a mouse with short limbs and one with a tail like a dachshund.
现在她已经不见踪影，睡觉去了，我又沉思了一两个钟头，虽然我的头和四肢痛得不想动，可是我也得鼓起勇气去睡觉了。
And now that she is vanished to her rest, and I have meditated for another hour or two, I shall summon courage to go, also, in spite of aching laziness of head and limbs.
实际上，两足动物的行走可能比四肢的行走花费更少的力气。
Walking as bipeds might actually use less energy than movement on all fours does.
因电击事故而失去四肢的一位法国男子成功游过英吉利海峡。为了完成这项挑战，他已付出了两年的艰辛努力。
A Frenchman who lost all his limbs in an electrical accident successfully swam across the Channel, a challenge he had been preparing for two years.
尽管这些家庭分布在不同的地域，但是用四肢行走的方式极为相似：两腿和两臂支撑很直，而末梢均朝向空中。
Despite the geographic separation of the families, the method of quadrupedal walking is similar: legs and arms held fairly straight, and bottom in the air.
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.
平均来看，大猩猩两条腿行走时消耗的能量与四肢着地行走时的差不多。
And the chimps, on average, use as much energy using two legs as they did when they used all four limbs.
如今，时隔两年之久，她已经丧失了说话的能力，并且四肢也不能正常活动。
Today, almost two years later, she has lost the power of speech and much use of her arms and legs.
问题就随之而来了：为什么在我们的类人猿亲戚们还在用四肢行走的时候，我们就已经直立并用两足行走呢？
The question, then: Why stand and walk on two legs when our ape Cousins get by on four limbs?
客厅里的两个玩偶是母亲和父亲，他们四肢长伸，僵硬地躺在那里，好像晕厥了一般，楼上则睡着两个孩子。
The father and mother dolls, who sprawled very stiff as though they had fainted in the drawing-room, and their two little children asleep upstairs, were really too big for the doll's house.
在这项最新的发表在PNAS上的研究中，科学家仔细考察了一块奇特的化石标本“小盗龙”（mircoraptor），这块化石上的四肢全部都有羽毛，有点类似两栖飞机（bi-plane）。
In the newest PNAS study, scientists examined a remarkable fossil specimen that had feathers on all four limbs, somewhat resembling a bi-plane.
现在只需一两分钟就可以焊接他那些钢铁巨兽的气压式四肢了。
It only takes him a minute or two to braze the broken pneumatic limbs of his iron beasts.
杨静的家在乐山，从5岁开始，便时常骨折，几乎四肢的关节都不同程度地骨折过一两次。
Yang Jing's home in Leshan, from the age of 5, it will often fracture, almost limb joints are fractures of varying degrees, once or twice.
这些动物之中，有的改变了形象或者失去四肢，但？们的共同祖先都具有四肢，两只在前、两只在后，位于原本是鱼鳍拍动的地方。
Some of these animals have modified or lost their limbs, but their common ancestor had them? Two in front and two in back, where fins once flicked instead.
基于所提出的位移函数，推导出平面问题分析公式和联肢剪力墙分析公式，举出两个算例。
Formulas for analysing plane problems as well as coupled shear walls are derived and two illustrative examples are given.
结论：与两对照组相比，胎鼠肢芽提取液呈现了显著的运动神经营养活性。
Conclusions: the limb bud extract showed marked motoneuron neurotrophic activities compared with the two controls.
他生就一只端正的鹰钩鼻，两片扁扁的薄嘴唇，四肢匀称，风度翩翩，众人立刻觉得此人非寻常之辈。
His well-formed aquiline nose, straight thin lips, and the admirable contour of his finely-formed limbs, impressed the whole company instantly with the idea of something uncommon.
结果：采用穴位透刺预防中风早期瘫肢肌张力增高的总有效率为92.5%，传统组总有效率为67.8%，两组比较有显著差异（P<0.05）。
Results: The total effective rate of the treatment group is 92.5%, the control group is 67.8%. There were significant difference on statistics (P<0.05).
本文在改进多垂直杆剪力墙模型基础上，以带刚域的局部纤维模型模拟连梁，两模型结合可很好的模拟联肢剪力墙。
Based on the modified-multi-vertical-line shear wall model, this paper adopted partial fiber model with rigid region to simulate coupling beams.
他的三个孩子有两个患有残疾，其中一个患有四肢瘫痪。
Two of his three children have special needs, he said, one being a quadriplegic.
在最近的这两年期间，在口腔溃疡发生之后的10至14天，在四肢产生许多红色及紫罗兰色，中间有一水泡的丘疹及斑块。
During the last two years, multiple erythematous to violaceous papules and plaques with a central vesicle over all four limbs had developed 10 to 14 days after the occurrence of oral ulcers.
本章后面的两个附录，还具体从西周以来的秦青铜礼器、直肢葬的例证，论证了秦文化的源流。
Two addenda after the chapter indicate the source of the Qin Culture on base of the Qin bronzes and extended burials from the Western Zhou.
尼摩船长已经站起来，我也开始伸展我的四肢，就在这个时候，出现一件意外的东西，我立即站起两脚。
Captain Nemo was already up, and I had started to stretch my limbs, when an unexpected apparition brought me sharply to my feet.
在受伤后两年，仅有1例感觉不敏感的保肢的患者丧失足底感觉。
At two years after the injury, only one patient in the insensate salvage group had absent plantar sensation.
英国海洋专家们抓到了一只少两个肢的章鱼，一只有六个肢的生物，科学家称之为“六爪鱼”
English marine experts have laid their hands on an octopus that's missing two of its own: a six-limbed creature that they have dubbed 'hexapus. '
英国海洋专家们抓到了一只少两个肢的章鱼，一只有六个肢的生物，科学家称之为“六爪鱼”
English marine experts have laid their hands on an octopus that's missing two of its own: a six-limbed creature that they have dubbed 'hexapus. '
应用推荐