名词
中文翻译：自愿计划
同义词：
['voluntary scheme', 'voluntary program']
例句：
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1. The school has a voluntary plan to provide free tutoring for students in need.
学校有一个自愿计划，为有需要的学生提供免费辅导。
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2. The project is a voluntary plan to reduce carbon emissions.
该项目是一个自愿计划，旨在减少碳排放。
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3. The company has implemented a voluntary plan to improve employee health and safety.
该公司已经实施了一个自愿计划，以提高员工的健康和安全。