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雅思写作小作文流程图考官范文:火山岛的形成

2017-07-18 10:45:13来源:网络 柯林斯词典

  新东方在线雅思频道特为大家收集整理了雅思写作小作文流程图考官范文:火山岛的形成。雅思写作考官范文很适合烤鸭研读模仿,在研读及模仿过程中,可以帮助我们检验自己的写作水平,并能很好地吸收和应用优秀范文里的优秀内容~更多雅思报名官网的最新消息,最新、最专业的雅思备考资料,新东方在线雅思网将第一时间为大家发布。

  >>>更多请点击:雅思写作Task 1小作文考官满分范文

  The diagram shows the growth cycle of a volcanic island. Write a 150-word report for a university lecturer describing the main features of the cycle.

雅思写作小作文流程图考官范文:火山岛的形成

  参考范文:

  The diagram illustrates a natural process in which a volcanic island grows from beneath the sea, explodes, and then eventually sinks to become an underwater reef. The process is divided into nine stages.

  In the first two stages, called the ‘preshield’ and ‘protoshield’ stages, a mountain gradually builds under the surface of the sea. In the third or ‘explosive’ phase, hydro-explosions occur which deposit a cone of ash. A large number of cinder cones then pile up to form a ‘shield’ on top of the volcano.

  This shield gradually erodes and subsides to form reefs below the surface of the sea. However, there may be ongoing volcanic activity including lava flows. By the time of the ‘coral atoll’ stage, the original form of the volcano has disappeared, and the whole structure sinks further under the sea during the ‘guyot’ stage.

  In summary, huge volcanoes rise and fall under the sea in a natural process known as the volcanic island growth cycle.


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