Pentagon
例子
The flag of the city had a pentagon in the center, symbolizing the five founders.
城市的旗帜中央有一个五边形，象征着五位创始人。
02
五角大楼, 五角大楼建筑
a five-sided U.S. government building that houses the Department of Defense
例子
Reporters waited outside the Pentagon for the official statement.
记者们在五角大楼外等待官方声明。
03
五角大楼, 美国军事机构
the U.S. military establishment as an institution
