在考研英语作文中，如果需要加入翻译，通常有以下几种方法：
直接翻译
将作文中的关键句子或段落直接翻译成英文。这种方法适用于那些需要直接表达原文意思的场合。
意译
如果直接翻译无法准确传达原文的意境或文化背景，可以选择意译。意译更注重传达原文的整体意思和情感，而不是逐字逐句的翻译。
插入式翻译
在作文的合适位置插入翻译，以帮助读者更好地理解作文的内容。这种方法通常用于解释复杂的概念或背景信息。
作文原文：
War and Peace
Generally, war is repugnant, but peace is welcome. While peace is the ultimate goal of all of our undertaking in the human civilization, war seems to be an inevitable part of it. The physical form and habits of the earth, the opposite effect, in which life actually modifies its surroundings—such as the assault on the environment being the contamination of air, earth, and rivers, chemicals being the sinister partners of radiation in changing the very nature of life—all these point to the complexity of the issue.
翻译插入：
Generally, war is repugnant, but peace is welcome. While peace is the ultimate goal of all of our undertaking in the human civilization, war seems to be an inevitable part of it. The physical form and habits of the earth, the opposite effect, in which life actually modifies its surroundings—such as the assault on the environment being the contamination of air, earth, and rivers, chemicals being the sinister partners of radiation in changing the very nature of life—all these point to the complexity of the issue.
分析：
在这个例子中，翻译被插入到了作文的中间部分，帮助读者更好地理解“战争与和平”这一主题的复杂性和战争的不可避免性。通过这种方式，翻译不仅提供了原文的意思，还增强了作文的可读性和表达效果。
建议：
在使用翻译时，要确保翻译的内容与原文内容紧密相关，并且能够增强作文的整体表达效果。
翻译应该简洁明了，避免过于冗长，以免影响作文的结构和阅读流畅性。
根据作文的主题和读者的背景，选择合适的翻译方法和风格。