Pentagon
01
五边形, 五角形
a geometric shape with five angles and five straight sides
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
a five-sided U.S. government building that houses the Department of Defense
例子
Reporters waited outside the Pentagon for the official statement.
03
the U.S. military establishment as an institution
