英语词汇useful diameter怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	useful diameter
释义	useful diameter 简明释义有效直径网络释义 1 ?有效直径 ... usable aperture 有效孔径，可用孔径 useful diameter 有效直径 useful work 有效功 ... 2 ?有效孔径 ... 使用性能 usable aperture 有效孔径，可用孔径 useful diameter 有效功 utiliscope ... 双语例句 1 In order to increase the speed of calculation, some useful methods are given for a cylinder whose diameter is larger compared to the wavelength. 提出了在大圆柱体情况下采用设虚元的方法，从而使远场的计算速度提高一倍。
随便看	delegated power delegated powers delegatee delegatees delegate function delegate meeting delegate power to the lower levels delegate-rich delegates delegateship delegate to delegate trust delegate type delegating delegating delegation delegation delegation legislation delegation of authority delegation of authority and responsibility delegation of duties delegation of power delegation of power of authority delegation of responsibility and authority delegation of trade

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