The diameter of the nucleus, if we think of it as roughly spherical, is of the order of 10－14m . 如把原子核粗略地看作球形，则它的直径的数量级为1014m。
The plate has holes of approximately 2 in. in diameter on 7-to 8-in. centers in staggered raws . 板上有直径近2英寸的孔眼，交错横排，孔眼中心距为7-8英寸。
The centre of this wooden disc was hollowed out to a diameter equal to the exterior diameter of the columbiad . 这木盘中间留着一个直径相当于哥伦比亚炮外径的圆洞。
Smith (1962) considered three alternate methods to determine an equivalent diameter of graded sediment . 史密斯（1962）提出了三种不同方法以计算不均匀沙的当量直径。
Each stay is composed of 25-5/8 in diameter dywidag bars encased in a metal sheath . 每根拉索由25根直径为58英寸（16毫米）的迪威达格式粗钢筋组成，拉索套在金属套管内。
Spot diameters of just a few thousands of an inch can readily be attained with convenient short focal length lenses . 用普通的短焦距透镜不难得到直径只有几十微米的光点。
The metering rod either has two or more steps of different diameters or is tapered at its lower end . 量油杆可以有两个或更多个不同直径的台阶，或在它的下端被逐渐削成锥形。
The oil-immersion objectives just described admit a wider cone of rays than a dry objective of the same diameter would . 刚才描述的油浸物镜与直径相同的干物镜相比，可容纳更宽的光线锥。
