名词
中文翻译：志愿者
同义词：
['volunteer', 'benefactor', 'helpers', 'volunteers']
例句：
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1. She is a volunteer at the local animal shelter.
她在当地的动物收容所做志愿者。
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2. The volunteers helped to clean up the park after the storm.
志愿者们在暴风雨后清理了公园。
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3. Many volunteers are needed for the upcoming event.
即将到来的活动需要许多志愿者。