| 单词 | fifth column |
| 释义 | fifth column n. A clandestine subversive organization working within a country to further an invading enemy's military and political aims. [First applied in 1936 to rebel sympathizers inside Madrid when four columns of rebel troops were attacking that city.] fifth colum·nism (kŏləm-nĭz′əm) n. fifth columnist n. |
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