形容词
中文翻译：自愿的
同义词：
['free', 'uncoerced', 'conscientious例句：1. The volunteers helped to clean up the streets after the storm.（志愿者们在暴风雨后帮助清理街道。）']
例句：
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1. The volunteers helped to clean up the streets after the storm.
志愿者们在暴风雨后帮助清理街道。
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2. He is a volunteer for the local animal shelter.
他是当地动物收容所的志愿者。
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3. Volunteering is a great way to give back to your community.
志愿服务是回馈社区的好方法。