The plane exploded against a wall of the huge five-sided building where more than twenty thousand people worked.

飞机撞上巨边形建筑物堵墙上爆炸了，两万多人在那里工作。

Eventually he chose a design for the building as a geometric pentagon – a building with five sides – and that's why the building is called the Pentagon.

最终他为这座建筑选择了个几何边形设计——座有个面建筑——这就这座建筑被称为楼原因。

The significance was that  that constant didn't depend on the shape itself, it could have been a square, or a cat, or the  pentagonal faces of our dodecahedron, whatever.

重要，这个常数并不取决于形状本身，它可能个正方形， 或者只猫，或者我们十二面体边形面，等等。

The cathedral garth was a cloistered, pentagonal garden with a bronze postmodern fountain. Katherine was amazed how loudly the fountain's flowing water seemed to be reverberating in the courtyard.

教堂花个封闭边形花, 里面有个青铜色后现代喷泉。凯瑟琳惊讶于喷泉流水似乎在庭院里回荡声音。

Gawain's integrity and honor, symbolized by his heraldic device of a pentangle, are at stake in the Adventure of the Green Chapel, and what chiefly threatens to impair them is fear of the Green Knight's axe.

高文正直和荣誉，以他边形纹章装置为象征，在绿色教堂冒险中处于危险之中，而威胁到他们主要对绿色骑士斧头恐惧。