| 词汇 | sign up | 
| 释义 | sign up  phrasal verb with sign verb uk/saɪn/ us/saɪn/ B1 报名参加(某项有组织的活动) to agree to become involved in an organized activity  [ + to infinitive ] I've signed up to make the sandwiches for the party. 我已报名为聚会做三明治。   She's signed up for evening classes at the community college. 她已经报名参加社区学院夜间课程的学习。  Synonym: sign on (AGREE TO HELP) | 
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