pentagon是什麽意思

pentagon

英 ['pentəɡ(ə)n] 美 ['pɛntəɡɑn]

pentagon 五邊形，五角形

penta-,五，-gon,邊，角，詞源同knee,heptagon.

pentagon: pentagon: see five
pentagon (n.): plane figure with five angles and five sides, 1560s, from Middle French pentagone or directly from Late Latin pentagonum "pentagon," from Greek pentagonon, noun use of neuter of adjective pentagonos "five-angled," from pente "five" (see five) + gonia "angle" (see -gon). The U.S. military headquarters Pentagon was completed 1942, so called for its shape; used allusively for "U.S. military leadership" from 1945. Related: Pentagonal.
In nature, pentagonal symmetry is rare in inanimate forms. Packed soap bubbles seem to strive for it but never quite succeed, and there are no mineral crystals with true pentagonal structures. But pentagonal geometry is basic to many living things, from roses and forget-me-nots to sea urchins and starfish. [Robert Bringhurst, "The Elements of Typographic Style," 1992]

1. The Pentagon will give preference to companies which do business electronically.: 美國國防部將會優先考慮那些能夠進行電子商務的公司。

2. Pentagon spokes-man Williams says those talks are coming along quite well.: 五角大樓發言人威廉斯說那些會談進展得相當順利。

4. The Pentagon says bad weather is hampering the allied air raids.: 五角大樓稱惡劣天氣妨礙聯合空襲。