常見例句雙語例句The optimum density is difficult to specify in terms of trees per acre .很難定論究竟每英畝多少株樹爲(wèi)最適密度。Plantations of slender spindles are an example of such optimum density conditions.細(xì)長紡鎚形栽植就是這種最適密度條件下的一個(gè)例証。In America, the optimum density for the best use of road space is around 50 vehicles per lane-mile .在美國,道路最佳使用傚率的理想車輛密度大約是每車道英裡50輛車。 返回 optimum density