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The three most significant types of fragile environment in these respects, and also in terms of the proportion of the Earth’s surface they cover, are
句子
The three most significant types of fragile environment in these respects, and also in terms of the proportion of the Earth’s surface they cover, are deserts, mountains and Arctic areas.
问题
句子分析（俗称“长难句分析”）是训练提高基础阅读能力的有效手段。我们通过对托福(TOEFL)、雅思(IELTS)、GRE、考研以及四六级等考试中真实出现过的句子（如真题、TPO，剑桥系列）进行结构化分析，可以有效提升句子理解的准确性和效率。朗播通过近百万的用户实际数据分析发现，练习 300-400 个句子，会让阅读能力有显著提升。请按顺序阅读句子，并思考：
1. 句子属于哪种结构类型？简单句？并列复合句？主从复合句？
2. 句子由哪些子句构成，连接这些子句的关联词是什么？
3. 每个子句中各个语法成分分别是哪些？
4. 句子的中文意思是什么？
1. 句子属于哪种结构类型？简单句？并列复合句？主从复合句？
2. 句子由哪些子句构成，连接这些子句的关联词是什么？
3. 每个子句中各个语法成分分别是哪些？
4. 句子的中文意思是什么？
1. 主从复合句
2. 原句中的各个子句，子句类型以及连接词
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主句The three most significant types of fragile environment in these respects, and also in terms of the proportion of the Earth’s surface are deserts, mountains and Arctic areas.子句类型:主句连接词:
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分句-1They cover the Earth’s surface.子句类型:定语从句连接词:
3. 句子成分
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主句The three most significant types [主语] of fragile environment in these respects, [定语] and [连接词] also in terms of the proportion of the Earth’s surface [定语] are [系动词] deserts, mountains and Arctic areas. [表语]
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分句-1They [主语] cover [谓语] the Earth’s surface. [宾语]
4. 句子翻译
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主句The three most significant types of fragile environment in these respects, and also in terms of the proportion of the Earth’s surface are deserts, mountains and Arctic areas.就这些方面以及地球表面的比例来说，三种最重要的环境类型是沙漠、山区和北极陆地。
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分句-1They cover the Earth’s surface.他们覆盖地球的表面。
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全句The three most significant types of fragile environment in these respects, and also in terms of the proportion of the Earth’s surface they cover, are deserts, mountains and Arctic areas.就这些方面以及它们所覆盖的地球表面的比例来说，三种最重要的环境类型是沙漠、山区和北极陆地。
考点解析
根据朗播专家权威分析，句子“The three most significant types of fragile environment in these respects, and also in terms of the proportion of the Earth’s surface they cover, are 英语长难句解析 ”主要针对以下知识点进行考查，关于这些知识点的讲解如下：
主从复合句
含有两套或更多的主谓结构，其中有一个是主要的主谓结构，其他主谓结构从属于它并且担任起句子成分。
①They believe that the computer will finally take the place of human beings.
②He asked me where he could get such medicine.
定语从句
在主从复合句中，对名词（或者整个句子）限定修饰，起定语作用的句子，就是定语从句。
①They rushed over to help the man whose car had broken down.
②The school that he once studied in is very famous.
主句
主从复合句中的主干句子，能单独使用或出现的句子。
①They believe that the computer will finally take the place of human beings.
②He asked me where he could get such medicine.
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