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- The internal structure of silica has a pyramid(tetrahedron) unit. 硅的内部结构是一个四面体。
- silica tetrahedron 硅氧四面体
- The Rubik's is a toy in the shape of a tetrahedron. 魔方是个四面体的玩具。
- The crude oil is chromatographed over silica gel. 粗制油状物用硅胶进行色谱分离。
- Containing little silica, as igneous rocks. 基性的基性的，含有比较少量的二氧化硅的作为火成岩的
- It is a compound of aluminum, silica, and fluorine. 它是铝、硅和氟的化合物。
- Containing little silica,as igneous rocks. 基性的基性的，含有比较少量的二氧化硅的作为火成岩的
- Silica is a basic unit in many ceramics. 硅是一种基本的陶瓷制品。
- Hydrophobic silica is the active antifoam agent. 憎水性硅石是一种有效的防泡剂。
- Productivity system is a dynamic "tetrahedron" in an abstract term. 生产力系统抽象地看是一个处于动态的“四面体”;
- This is the top view of an oxygen-silicon tetrahedron. 这是一个硅氧四面体的俯视图。
- The microspores in tetrad stage showed tetrahedron structure. 小孢子四分体为四面体型。
- Beneficiation removes clay and silica to considerable extent. 富集操作除去粘土和硅石达到相当高的程度。
- A variety of silica that contains microcrystalline quartz. 燧石含微小晶状的石英的各种硅石
- A translucent mineral of hydrated silica, often used as a gem. 蛋白石一种非晶质氧化硅，含有明显的变色晕彩，常被用来当作宝石
- It's my illusion or?Why do I feel it's octahedron but not tetrahedron? 是我错觉还是什么？我怎么感觉这剑条是个八面的而非四面的？
- The pattern of microspores in the tetrad period is of tetrahedron type. 小孢子四分体时期其排列为四面体型。
- Preparation process of colloidal silica coating and compound she. 介绍硅溶胶涂料的配制过程及复合制壳工艺,对使用结果作了简要分析。
- A varietyof silica that contains microcrystalline quartz. 燧石含微小晶状的石英的各种硅石。
- The oxidation rates are fastest in freshly cleaned silica vessels. 在新清洗的二氧化硅容器中，氧化速度是最快的。
