A pentagon is a flat shape with five straight sides and five corners. If all the sides are the same length, it is a regular pentagon — like a house drawn from above, but with five walls instead of four. In maths class that is the whole story.

A pentagonpentagon(五邊形) is a flat shape with five straight sides and five corners是有五條直邊、五個角的平面形狀. If all the sides are the same length如果每條邊長度都一樣, it is a regular pentagon那就是正五邊形 — like a house drawn from above就像從空中往下看的房子, but with five walls instead of four只是牆變成五面而不是四面. In maths class在數學課上 that is the whole story這就是全部的故事了

Though actually, when English speakers say the Pentagon, with a capital P, they almost always mean the huge five-sided building in the United States that houses the Department of Defense, and by extension the US military leadership. Newspapers do this constantly.

Though actually不過其實, when English speakers say the Pentagon, with a capital P當英語人士說the Pentagon、大寫P的時候, they almost always mean the huge five-sided building in the United States幾乎都是指美國那棟巨大的五邊形建築 that houses the Department of Defense也就是國防部所在地, and by extension the US military leadership進一步引申指美國軍方高層. Newspapers do this constantly報紙一直都是這樣用

The building was named after its shape. So the same word is a geometry term and, with a capital letter, a political one.

The building was named after its shape這棟建築是以它的形狀來命名的. So the same word is a geometry term所以同一個字既是幾何名詞 and, with a capital letter, a political one大寫時又是個政治用語