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雅思阅读练习之生物体衰老死亡的原因

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  • TA的每日心情
    难过
    2018-12-15 09:05
  • 签到天数: 608 天

    [LV.9]以坛为家II

    发表于 2018-3-8 10:07 |显示全部楼层 | 阅读模式
    雅思精准核心预测

           下面就是雅思网为大家收集整理的雅思阅读练习:生物体衰老死亡的原因,供大家参考,希望以下内容能够为同学们的雅思备考提供帮助。

      阅读段落

      Thus ageing and death should not be seen as inevitable, particularly as the organism possesses many mechanisms for repair. It is not, in principle, necessary for a biological system to age and die. Nevertheless, a restricted life span ageing, and then death are basic characteristics of life. The reason for this is easy to recognise: in nature, the existent organisms either adapt or are regularly replaced by new types. Because of changes in the genetic material (mutations) these have new characteristics and in the course of their individual lives they are tested for optimal or better adaptation to the environmental conditions. Immortality would disturb this system—it needs room for new and better life. This is the basic problem of evolution.

      段落大意

      本段主要分析了生物体寿命的有限性,以及生物体存在衰老死亡的原因。

      阅读笔记

      Organism possesses mechanisms for repair → ageing and death not inevitable,

      NEVERTHELESS

      Basic characteristic of life:restricted life span is

      Basic problem of evolution:Immortality disturb system—it needs room for new and better life

      逻辑关系

      1. 因果(逻辑连接词: BECAUSE OF)

      Because of changes in the genetic material (mutations)

      These have new characteristics and in the course of their individual lives they are tested for optimal or better adaptation to the environmental conditions.



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