形容词
中文翻译：自愿的
同义词：
['free', 'uncoerced', 'spontaneous例句：1. The volunteer firefighters were called to the scene of the fire.（志愿者消防员被召到火灾现场。）']
例句：
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1. The volunteer firefighters were called to the scene of the fire.
志愿者消防员被召到火灾现场。
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2.The voluntary donation will help fund a new library.
自愿捐赠将资助新图书馆的建设。
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3.He decided to volunteer for a charity event.
他决定为慈善活动做志愿者。