左右撇子之谜：终于找到答案了！？ Why Are There More Right-Handed People Than Left-Handed People?
Why Are There More Right-Handed People Than Left-Handed People?
8/12 解析英语
作者 Mark Darvill
阅读时间 6分钟
听讲解 听朗读
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左右撇子之谜：终于找到答案了！？ Why Are There More Right-Handed People Than Left-Handed People?
世界上右撇子的人数远比左撇子还多更多，这是广为周知的。
目录 / Tips & Analysis / More to Learn / 中文翻译(& 答案)
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It’s widely recognized that there are far more right-handed people than left-handed people in the world. Being right-handed simply means preferring to use one’s right hand for tasks that involve only one hand, such as writing and eating. But have you ever wondered about the possible reasons behind the global dominance of the right hand over the left?
As with many complex biological questions, multiple factors appear to be at play. First, one reason seems to be genetics. __1__ Therefore, the global dominance of right-handedness is something that has been passed down through many generations of humans.
Next, the answer may also be related to how the human brain works. __2__ Interestingly, the left and right hemispheres control movements on opposite sides of the body. In other words, the left side of the brain controls the right side of the body, and vice versa. Moreover, the left side of the brain is the side responsible for planning and fine motor skills. __3__
Finally, cultural influence also plays a role in which hand people prefer. Historically, items that require physical manipulation have been designed for right-handed use. For example, tools like scissors and musical instruments are often constructed with right-handers in mind, making it difficult for left-handers to use them. __4__
While these factors offer some explanation, they remain speculative. The precise reasons for the global prevalence of right-handed people continue to be debated. Nevertheless, left-handedness will remain a phenomenon of great curiosity among scientists and researchers for many years to come.
(A) Specifically, different areas of the brain control different functions.
(B) Thus, this side tends to be more active when the body is engaged in physical tasks.
(C) Research has shown that the preference for one hand over the other can run in families.
(D) Consequently, many people born naturally left-handed may have had to adapt by learning to use their right hand.
↓ 完整文章版本（无挖空）
It’s widely recognized that there are far more right-handed people than left-handed people in the world. Being right-handed simply means preferring to use one’s right hand for tasks that involve only one hand, such as writing and eating. But have you ever wondered about the possible reasons behind the global dominance of the right hand over the left?
As with many complex biological questions, multiple factors appear to be at play. First, one reason seems to be genetics. Research has shown that the preference for one hand over the other can run in families. Therefore, the global dominance of right-handedness is something that has been passed down through many generations of humans.
Next, the answer may also be related to how the human brain works.Specifically, different areas of the brain control different functions. Interestingly, the left and right hemispheres control movements on opposite sides of the body. In other words, the left side of the brain controls the right side of the body, and vice versa. Moreover, the left side of the brain is the side responsible for planning and fine motor skills. Thus, this side tends to be more active when the body is engaged in physical tasks.
Finally, cultural influence also plays a role in which hand people prefer. Historically, items that require physical manipulation have been designed for right-handed use. For example, tools like scissors and musical instruments are often constructed with right-handers in mind, making it difficult for left-handers to use them. Consequently, many people born naturally left-handed may have had to adapt by learning to use their right hand.
While these factors offer some explanation, they remain speculative. The precise reasons for the global prevalence of right-handed people continue to be debated. Nevertheless, left-handedness will remain a phenomenon of great curiosity among scientists and researchers for many years to come.
单字片语整理
Words in Use
●
dominance [ˋdɑmənəns]
n. 主导地位；优势
●
biological [͵baɪəˋlɑdʒɪk!]
a. 生物 (学) 的
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genetics [dʒəˋnɛtɪks]
n. 基因学 (不可数)
●
hemisphere [ˋhɛməs͵fɪr]
n. （地球）半球
●
manipulation [mə͵nɪpjʊˋleʃən]
n. 操纵；控制
●
speculative [ˋspɛkjə͵letɪv]
a. 推测的
●
prevalence [ˋprɛvələns]
n. 普及，流行
Extra Words
●
motor [ˋmotɚ]
n. 马达
Practical Phrases
●
be at play 有影响，起作用
Climate change is a complex issue with multiple factors at play.
气候变迁是个复杂的议题，有多重因素造成了影响。
●
pass down.../pass...down 传承⋯⋯
It's a family recipe passed down from my great-grandmother.
这是从我曾祖母传承下来的家传食谱。
●
vice versa 反之亦然，反过来说（vice versa 之前通常须接 and 或 or 等连接词，而不 可单独使用。）
You can now access your home computer from work and vice versa.
你现在可以从工作地点连线使用家里的电脑，反之亦然。
●
play a role in 在⋯⋯发挥重要作用，在⋯⋯方面扮演重要角色
The parents played a role in the education of their children.
这对父母在他们孩子的教育方面扮演重要角色。
Tips & Analysis
1. 第一题空格应选 (C)
理由
a. 本空格在测试对段落语意连贯性的掌握，空格前一句提到，大多数人是右撇子的第一个可能原因是与遗传相关，后一句则提到全球主要是右撇子这件事是代代相传的，可推测空格应进一步说明遗传与惯用手之间的关系，且应该跟「传承」有关。
b. 选项 (C) 表示，研究显示，偏好用某一只手胜过另一只手可能是家族遗传，语意连贯，且选项中提到家族遗传，与前一句的遗传和后一句的代代相传互相呼应，可知答案应选 (C)。
2. 第二题空格应选 (A)
理由
a. 本空格在测试对段落语意连贯性的掌握，空格前一句提到右撇子居多的另一个答案可能与人类大脑的运作方式有关，而后一句提到左右脑各别控制身体的对侧，可推测空格应是说明大脑的运作方式。
b. 选项 (A) 表示，具体来说，大脑不同的区域控制不同功能，语意连贯，说明了大脑的运作方式是不同区域控制不同功能，后一句则进一步说明左右脑控制的身体部分，故答案应选 (A)。
3. 第三题空格应选 (B)
理由
a. 本空格在测试对段落语意发展的掌握，空格前一句提到左脑主要负责规划和精细动作技能，可推测空格应进一步说明此事实与身体有何关联。
b. 选项 (B) 表示，因此，这半边的大脑在身体从事肢体活动时往往会比较活跃，语意连贯，选项中的 this side（这半边）指的即是前一句提到的左脑，且前一句中的 fine motor skills（精细的动作技能）与选项中的 physical activities（肢体活动）互相呼应，可知答案应选 (B)。
4. 第四题空格应选 (D)
理由
a. 本空格在测试对段落语意结论句的掌握，本段旨在说明文化影响如何造成大多数人皆是右撇子的现象，且空格前一句提到工具多是考虑到右撇子来进行设计，可推测空格应与这种文化如何造就右撇子成为多数有关。
b. 选项 (D) 表示，因此，许多天生就是左撇子的人可能就必须透过学习使用右手来适应，语意连贯，且选项中所提到的适应，即是适应为了右撇子来进行设计的工具，故答案应选 (D)。
More to Learn
phenomenon n. 现象（单数形）
• Lightning is an electrical phenomenon.
闪电是一种电的现象。
以下介绍 phenomenon 的其他意思及衍生字：
a. 本字的复数形为 phenomena 。
• Total solar eclipses are spectacular natural phenomena that dazzle many people.
全日蚀是壮观的自然景象，使许多人着迷。
b. phenomenon 亦可表「造成轰动的人事物」。
• The new mobile game became a phenomenon overnight, with millions of downloads within hours of its release.
这款新的手机游戏一夜之间造成轰动，发布后几个小时内就被下载了数百万次。
c. phenomenal a. 极好的；惊人的
• Kevin has been a phenomenal success in the world of business.
凯文在商界的成就非凡。
d. phenomenally adv. 极其，惊人地
• This new show is phenomenally successful.
这个新节目非常成功。
中文翻译(& 答案)
世界上右撇子的人数远比左撇子还多更多，这是广为周知的。身为右撇子单纯指偏好使用右手来进行只会用到一只手的任务（像是写字和吃饭）。但你是否曾思考过全球主要都是右撇子而非左撇子背后的可能原因呢？
就如同许多复杂的生物问题，许多因素似乎都有影响。首先，一个原因似乎是遗传。研究显示，偏好用某一只手胜过另一只手可能是家族遗传。因此，全球主要都是右撇子这件事，就是人类代代相传而来的。
接着，答案可能也和人类大脑是如何运作的有关。具体来说，大脑不同的区域控制不同功能。有趣的是，左右脑控制的是身体另一边的活动。换句话说，左脑控制身体右半边，右脑控制身体左半边。再者，左脑负责规划和精细动作技能。因此，这半边的大脑在身体从事肢体活动时往往会比较活跃。
最后，文化影响也在人们偏好哪一只手上扮演一角。历史上，需要用到肢体操作的物品都被设计来供右手使用。举例来说，像是剪刀、乐器等工具常常就是考虑到右撇子而打造的，造成左撇子难以使用这些工具。因此，许多天生就是左撇子的人可能就必须透过学习使用右手来适应。
虽然这些因素都提供了一些解释，但它们仍是推测而已。全球右撇子如此普及，确切的原因仍持续被争论着。不过，在未来的许多年里，左撇子依然会是科学家和研究人员相当好奇的一个现象。
答案： 1. C 2. A 3. B 4. D
