词族 · octahedron
词形变化
英语词源
- octahedron (n.)
- 1560s, from Greek oktahedron, neuter of oktahedros "eight-sided," from okta- "eight" (see octa-) + hedra "seat" (see sedentary). Related: Octahedral.
权威例句
- 1. The cycle sum of the rotation group of the octahedron was calculated.
- 正八面体的旋转群的循环和已算出.
- 2. Making oars. First step - from square to octahedron.
- 制作浆. 第一步从方形到八面形.
- 3. An octahedral tessellation approximates a spherewith an octahedron whose vertices are all on the unIt'sphere.
- 八面体三角化把球面近似于一个顶点在单位球上的八面体.
- 4. The octahedron steel ingot and V - anvil forging bar can effectively prevent cracks in crystal boundary.
- 因此采用八棱形钢锭锻造齿轮轴,并采取上下V形砧拔长圆坯的方式可以有效地防止轴心晶间裂纹的出现.
- 5. The synthesis of regular octahedron cobalt oxide battery material in supercritical carbon dioxide system was studied.
- 研究了正八面体氧化钴颗粒在超临界二氧化碳体系中的合成过程.