| 词汇 | pentagon |
| 词根词缀 | 词源： plane figure with five angles and five sides, 1570, from M.Fr. pentagone, from L.L. pentagonum "pentagon," from Gk. pentagonon, properly neut. of adj. pentagonos "five-angled," from pente "five" + gonia "angle" (see knee). The U.S. military headquarters Pentagon was completed 1942, so called for its shape; used allusively for "U.S. military leadership" from 1945. 词根记忆： 五角形;五角大楼(penta+gon角)[penta-表示"五"] n. 五角形;五角大楼(penta五+gon)[gon=angle,表示"角"] 词根词缀： pentagon pentagon五角形,五角大楼(penta+gon角) penta-表示”五”pentagon五角形,五角大楼(penta+gon角) pentagram五角星形(penta+gram写,图=五角形图形) pentoxide五氧化物(pent+penta+oxide氧化物) pentagon n 五角形,五角大楼(penta五+gon) gon=angle,表示”角” trigon n 三角形(tri三+gon) perigon n 周围,360角(peri周围+gon) pentagon n 五角形,五角大楼(penta五+gon) diagonal n 对角线(dia对着+gon+al) |
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