| 词汇 | contract in/out | 
| 释义 | contract in/out  phrasal verb with contract verb uk/kənˈtrækt/ us/kənˈtrækt/   UK   签约加入(退出);同意加入(退出) to formally agree to take part/stop taking part in an official plan or system  Have you contracted in to the pension scheme? 你参加养老金计划了吗?  | 
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