雅思寫作小作文高分范文-火山島的形成
2017/7/28 16:53:54來源：新航道作者：新航道
摘要：雅思寫作是中國考生們的一大頭疼科目，難以提高的科目.上海新航道雅思小編雅思寫作小作文高分范文-火山島的形成，希望幫助考生對照寫作范文研究真題，充分備考，爭取理想成績，實現留學夢想。
雅思寫作是中國考生們的一大頭疼科目，難以提高的科目.上海新航道雅思小編雅思寫作小作文高分范文-火山島的形成，希望幫助考生對照寫作范文研究真題，充分備考，爭取理想成績，實現留學夢想。
雅思寫作小作文題目：
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.
雅思寫作小作文范文：
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.
以上就是小編給大家分享的雅思寫作小作文范文匯總，通過范文可以有效幫助大家備考雅思寫作考試，爭取理想成績，實現留學夢想。
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