| 单词 | pentagon |
| 释义 | Word Frequency pentagon(ˈpɛntəˌɡɒn) noun a polygon having five sides Derived forms pentagonal (pɛnˈtæɡənəl) adjective Word Frequency Pentagon(ˈpɛntəˌɡɒn) noun 1. the five-sided building in Arlington, Virginia, that houses the headquarters of the US Department of Defense. Part of the building was severely damaged in the terrorist attacks of 11 September 2001 2. the military leadership of the US |
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