蓝皮书计划 meaning in English
project blue book
Examples
- There is one small file relating to the air force ' s project bluebook for the investigation of unidentified flying objects . the secretary of the air force discontinued this program in 1969
译：有一个小的文件为未经确认飞的物体的调查与空军的“蓝皮书计划”有关。空军的秘密在1969年停止了这一计划。