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哆啦爱梅
对应的英语：Dear All,We are going to recruit five volunteers to help elderly this Sunday.Please send your details to the online administration on the website of the Student Union if you like to join us.Student Union.
Lizzy520520
call up volunteers to sign up at the Student Union
yolanda甯
这些单词的全面用法用好去买部大头字典看下，如商务印书馆出版的《朗文当代英语高级词典》，里面各种短语都有
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