| 词汇 | Plan B | 
| 释义 | Plan B  noun [ C or U ] (also plan B) uk/ˌplæn ˈbiː/ us/ˌplæn ˈbiː/  B计划 a plan or method that you use if another one fails, or is likely to fail   We had no Plan B to fall back on.  A second shaft is being drilled as a plan B, in case the original bore hole encounters problems. 第二个竖井作为B计划正在钻探,以防原来的钻孔遇到问题。   
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