| 单词 | circumvallation |
| 释义 | circumvallationcir·cum·val·lateC0367700 (sûr′kəm-văl′āt′)CircumvallationCircumvallationa line of entrenchments or ramparts around a besieged fortress. Circumvallation was used until the 19th century by the besieging forces to repulse an attack from enemy forces coming to help the besieged. |
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