来自：查字典高考网 2014-12-25
In general， people are living longer now. Discuss the causes of this phenomenon.
论点： 没有结论，不可知，但是有各种说法
1. 个人因素： 饮食，环境，医疗， 体育锻炼
2. 家庭因素： 遗传的争议
3. 社会因素： 整体生活水平和医疗水平，社会的价值和美学体系
4. 未知的神秘两难： 人必死，人要生
Human life spanorlongevity has been presumably claimed to be longer than it was. Nevertheless， no verified statistics are available to support this assumption. Although many theories have been put forward to shed lights on the mystery of human aging， debility， and death， the correlation between longevity and a factorora series of factors is yet spurious.
In the ancient times， human life span was deemed to be determined by unknown force， whose name varied from religion to religion and from culture to culture. In ancient China， it was considered to be totally doomedorpredestined. The force was called Tian Ming. Tian means the heaven， similar to the Father in Heaven in Christian religion， while Ming implies fate. Hellenistic culture and Egyptian civilization have similar counterparts but in different versions.
In the modern time， nevertheless， science and technology have not only dominated human material world but also exerted tremendous influences on mentalorspiritual world， eroding the primitive faith and beliefs about human life and longevity. But scientists have never reached a conclusive agreement about the determinant of human life span. Some scientists attempt to reveal this millennium myth by conducting research on the process of aging. They assume that human life span is genetically determined. That is to say human genes contain a program that determines the life span. Nevertheless， the correlation between gene and life span remains to be a myth. In this case， what the scientists have undertaken is nothing but to create more myths because they first have to understand what gene is and then they must unambiguously explain what the program is and who creates the program in gene. Alas!
Some scholars even argue that the modern medicine and advanced medical care programs， together with healthier foods and scientific eating habits， have contributed to the assumed longer human life span. They， however， have failed to see that in many cases it was just these modern medicineormedical care programs that account for why people today have more lethalorpestilential diseases such as the highly contagious respiratory illness appeared in 2002 called SARS . The use of antibiotics is also believed to be the direct cause of some new virus such as the corona virus in the SARS case.
As to the foods， it is hard to believe that they are healthier. In fact many crops， vegetables， fruits， and animals have been formidably polluted in the process of growing by pesticides， herbicides， and chemical fertilizers. Therefore， it is arbitrary to say that healthier foods help people live longer. In addition， the prevailing eating habitsorlife styles might be scientific because they are heavily influencedoraffected by scientists and their cheap products. But it is invalid to claim that scientific life style naturally leads to longer life span. Neither convincing scientific theories nor empirical evidence show that foods and the way people eat contribute to the extension of human life span.
To summarize， no verified evidence demonstrates that human life span today is longer than it was， in statistic sense， since it is impossible to compare the life span of an individual to hisorher otherwise life span. Moreover， the factors contributing to human life spanorlongevity are too complex to know yet.
【托福写作范文：人们长寿的原因】相关文章：
[标签：海外留学,语言考试,托福,,]
高考阅卷名师给考生的高考作文密训课 第3集 高考作文审题实操方法精讲（一）
学渣儿子高考，英语选择题全选B！老师通报成绩的那一刻父亲懵了
北京新闻 2019 5.9万余北京考生今日高考 语文试题鼓励创造性阅读与表达
优秀！英语数学双满分，广西“最牛”高考状元730分刷新最高纪录
爆笑班主任 第一季 第221集 高考结束学生有多疯狂？山东王老师疯狂吐槽
他高考作文仅得6分，总分428分，被985高校录取，却被导师拒绝！
探秘历史 第二季 第233集 考英语用来睡觉，结果仍是高考状元，如今她怎么样了？
探秘历史 第二季 第211集 此人高考数学考了0分，因作文写3句话被重点大学录取
一边扔试卷一边玩摇滚？这个学校的高考减压方式，真是帅到没朋友
沈阳音乐学院郎亦农教授的女高音高考曲目解析课程 第1集 沈阳音乐学院郎亦农为你讲解女高音高考曲目
