考研英语写作作为考研英语考试的重要组成部分，一直是考生关注的焦点。要想在考研英语写作中取得高分，除了掌握一定的写作技巧外，还需要掌握一些关键词。本文将从关键词的定义、作用以及如何运用关键词等方面进行论述，旨在帮助考生提高考研英语写作水平。
一、关键词的定义与作用
1. 关键词的定义
关键词，即关键词汇，是指在写作过程中，能够准确、简洁地表达文章主旨和观点的词汇。关键词的选择应遵循以下原则：一是准确性，即所选取的词汇要符合和语境；二是简洁性，即所选取的词汇要能够概括文章的核心内容；三是丰富性，即所选取的词汇要具有多样性，以丰富文章的表达。
2. 关键词的作用
（1）明确文章主旨：关键词能够准确表达文章主旨，使读者在阅读过程中迅速抓住文章核心内容。
（2）丰富文章表达：通过运用不同关键词，可以使文章的表达更加丰富、生动。
（3）提高文章质量：恰当运用关键词，有助于提高文章的条理性和逻辑性，使文章更具说服力。
二、关键词的运用策略
1. 主题关键词
主题关键词是指能够概括文章主题的词汇。在写作过程中，首先要明确文章主题，然后选择合适的主题关键词。例如，在论述环保问题时，可以选用“environmental protection”、“sustainable development”等关键词。
2. 观点关键词
观点关键词是指能够表达作者观点的词汇。在写作过程中，要根据和观点，选择相应的观点关键词。例如，在论述教育问题时，可以选用“education reform”、“quality-oriented education”等关键词。
3. 段落关键词
段落关键词是指能够概括段落内容的词汇。在写作过程中，要确保每个段落都有明确的关键词，使文章结构清晰。例如，在论述科技创新时，可以选用“technology innovation”、“industrial revolution”等关键词。
4. 修辞关键词
修辞关键词是指能够增强文章表达效果的词汇。在写作过程中，要善于运用修辞手法，使文章更具感染力。例如，在论述历史人物时，可以选用“brave”、“wise”、“fearless”等修辞关键词。
三、案例分析
以下是一篇考研英语写作范文，其中包含了丰富的关键词：
Title: The Importance of Environmental Protection
In recent years, the issue of environmental protection has attracted worldwide attention. As we all know, our planet is facing serious challenges, such as air and water pollution, deforestation, and climate change. Therefore, it is high time for us to take effective measures to protect our environment.
Firstly, environmental protection is crucial for the sustainable development of our planet. With the rapid development of industry and urbanization, natural resources are being exhausted at an alarming rate. If we continue to ignore environmental issues, our planet will be in peril. Moreover, environmental degradation has a profound impact on human health and well-being. For example, air pollution can lead to respiratory diseases, while water pollution can cause various waterborne diseases.
Secondly, environmental protection is essential for the prosperity of our society. A healthy environment is the foundation of a harmonious society. If we fail to protect our environment, social conflicts and economic losses will occur. In addition, environmental protection can promote the development of green industries, creating more job opportunities and improving the quality of life.
To achieve environmental protection, we should take the following measures. Firstly, governments should establish strict environmental regulations and enforce them effectively. Secondly, individuals should cultivate a sense of environmental responsibility and adopt a green lifestyle. Thirdly, international cooperation is indispensable in addressing global environmental issues.
In conclusion, environmental protection is of great significance for both our planet and society. We should take action now to protect our environment and ensure a sustainable future for our offspring.
关键词在考研英语写作中具有重要作用。通过掌握关键词的定义、作用以及运用策略，考生可以提高写作水平，为考研英语考试取得优异成绩奠定基础。在今后的学习和写作过程中，考生要注重积累关键词，提高自己的词汇运用能力。
