动词
中文翻译：Unknown
同义词：
['engage', 'take part in', 'get involved']
例句：
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1. She decided to join the army for a year.
她决定参军一年。
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2. The team worked hard to prepare for the upcoming competition.
团队努力准备即将到来的比赛。
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3. He volunteered to help out at the local food bank.
他自愿在当地食品银行帮忙。