| 单词 | 边长 |
| 释义 | 〔steradian〕A unit of measure equal to the solid angle subtended at the center of a sphere by an area on the surface of the sphere that is equal to the radius squared:立体弧度：由球心所张成的立体角，它在球面上所截取平面的面积等于以球半径为边长的正方形面积：〔cubic〕Having a volume equal to a cube whose edge is of a stated length:立方的：具有与一个边长固定的立方体相同体积的：〔pantograph〕An instrument for copying a plane figure to a desired scale, consisting of styluses for tracing and copying mounted on four jointed rods in the form of a parallelogram with extended sides.缩放仪：一种按所需的比例复制平面图片的仪器，由用于描绘和复制的描画针组成，描画针置于四根有活节的杆上，四根杆构成可调整边长的平行四边形〔square〕Something having an equal-sided rectangular form:方形物：具有边长相等的四边形形状的物体：〔vibrissa〕One of several long modified feathers that grow along the gape of the mouth of insect-eating birds.触须：吃昆虫的鸟嘴边长的长羽须 |
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