But this evolutionary mechanism combining dissymmetry, anatomy, and chance does not provide an adequate explanation of why right-handedness should have become predominant.
但是这种结合了不对称、解剖学和偶然性的进化机制并不能提供一个充分的解释来说明为什么右利手应该成为优势。
Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right-handedness or left-handedness.
在这里，进化理论必须遵从一种基于明确的发展机制的理论，这种机制既可以支持右撇子，也可以支持左撇子。
This evolutionary mechanism combining dissymmetry, anatomy, and chance does not provide an adequate explanation of why right-handedness should have become predominant.
这种结合不对称、解剖学和偶然性的进化论机制并未提供一种充分的解释，以说明蜗牛的右旋何以会成为主要的旋向。
Why do humans, virtually alone among all animal species, display a distinct left or right-handedness?
为什么人类，事实上在所有的动物物种中独一无二地，显示出惯用左手或是右手？
Olivia: I read an interesting theory about that. It talked about the evolutionary origins of preferential3 right-handedness in humans.
奥莉维亚：我读过一篇有趣的相关论文，谈到人类选择使用右手的进化起源。
Of 158 stencils in the French cave of Gargas, 136 have been identified as left, and only 22 as right; right-handedness was therefore heavily predominant.
在法国加格斯山洞里的158个印模中，有136个证实是左手印，只有22个是右手的，因此使用右手现象是非常明显的。
In the 1860s the French surgeon Paul Broca noted a relationship between right-handedness and left-hemispheric brain specialization for language abilities.
在19世纪60年代，法国外科医生PaulBroca注意到“右利手”和左大脑半球专门负责语言能力的关系。
If asked to explain the significance of this preference most people reply that it is obviously the result of the predominance of right-handedness in the population.
如果被提请解释这一偏爱的意义时，大多数人会回答说，显然这是人们以右手为主的这种优势造成的结果。
Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right or left-handedness.
在这里，进化理论必须遵从一种基于明确的发展机制的理论，这种机制可以支持右撇子或左撇子的现象。
If amino acids are found, it would be especially interesting if they show a prevalence of one type of handedness, either left, like amino acids on Earth, or right.
如果发现了氨基酸，并且它们普遍表现出同一种偏向性——要么像地球上的氨基酸一样是左旋的，要么是右旋的，那将会格外有趣。
Nor does it explain why, in a species where one parent determines handedness, a brood is not exclusively right-or left-handed when the offspring would have the same genetic predisposition.
这也不能解释为什么在一个由父母一方决定用利手的物种中，当后代具有相同的遗传倾向时，他们并非完全是右撇子或左撇子。
Nor does it explain why, in a species where one parent determines handedness, a brood is not exclusively right or left-handed when the offspring would have the same genetic predisposition.
这也不能解释为什么在一个由父母一方决定利手的物种中，当后代具有相同的遗传倾向时，他们并非完全是右撇子或左撇子。
Nor does it explain why, in a species where one parent determines handedness, a brood is not exclusively right- or left-handed when the offspring would have the same genetic predisposition.
这也不能解释为什么在一个由父母一方决定用手习惯的物种中，当后代具有相同的遗传倾向时，他们并非完全是右撇子或左撇子。
Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right-or left-handedness.
在这里，进化理论必须遵从一种基于明确的发展机制的理论，这种机制可以支持右撇子或左撇子。
Many of the key molecules for life have a specific direction, or handedness: DNA twists to the right, amino acids to the left.
构成生命体的许多关键分子都有一个特定的导向，或者说是旋向性：脱氧核糖核酸右旋，氨基酸左旋。
You're limited by their software, their operating system, their monitor size, even their right - or left-handedness.
您会受到他们的软件、操作系统、显示器大小甚至是左右手使用习惯的限制。
In biochemistry, handedness can matter. Left - and right-handed versions may, for example, smell different.
在生物化学中，手性是有意义的，如左旋和右旋的物质气味可能不同。
But the riddle of what underlies handedness remains. Its proportions - roughly 90 percent of people are right-handed and 10 percent left-handed - stay consistent over time.
但是，偏手性始终是个谜。它的比例——人群中大约90%是右手使用者，10%是左手使用者——始终保持不变。
Each fish that had been spawned in the normal water consistently preferred to turn either right or left every time it reached the barrier, a sign of "handedness."
那些在正常海水中长大的鱼苗遇到前方障碍物时，要么总是向左转，要么总是向右转，就像左撇子或者右撇子一样。
The hereditary mode of handedness or folding leg was likely the dominant heredity of single gene of autosome, and the right type of them was the dominant character.
利手和叠腿很可能均为常染色体单基因遗传，利手右型和叠腿右型分别为显性性状；
The hereditary mode of handedness or folding leg was likely the dominant heredity of single gene of autosome, and the right type of them was the dominant character.
利手和叠腿很可能均为常染色体单基因遗传，利手右型和叠腿右型分别为显性性状；
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