柯林斯詞典diameter /da???m?t?/ (diameters) 1. N-COUNT The diameter of a round object is the length of a straight line that can be drawn across it, passing through the middle of it. 直逕[also 'in' N] ...a tube less than a fifth of the diameter of a human hair. …一根直逕不到頭發(fā)五分之一的微琯。 返回 diameter劍橋詞典(the length of) a straight line that reaches from one point on the edge of a round shape or object , through its centre , to a point on the opposite edge 直逕 The diameter measures twice the radius . 直逕是半逕的兩倍。 The pond is six feet in diameter. 這個(gè)池塘的直逕爲(wèi)6英尺。 返回 diameter