名词
中文翻译：Unknown
同义词：
['pleading letter', 'appeal letter', 'petition letter']
例句：
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1. The begging letter from the poor woman reached the mayor's office.
那个贫穷女人的求援信送到了市长办公室。
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2. The appeal letter was sent to the government for help with the flood relief efforts.
一封请愿信被寄给了政府，请求帮助应对洪水救援工作。
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3. The petition letter requested that the school provide more resources for students with disabilities.
请愿信要求学校为有残疾的学生提供更多资源。