Silica structure is based on a tetrahedral arrangement of a silica atom bonded to oxygen atoms.

它的基本结构是由一个硅原子与四个氧原子成键，构成一个四。

Its molecules form tetrahedral shapes — that's a triangular pyramid, or a d4 if you're into tabletop RPGs.

它的分子结合成四——这是一种三角的棱锥，或者是桌角色扮演游戏中的d4。

And this is that tetrahedral shape.

这就是那个四状。

And so water is locked into that tetrahedral structure.

因此，水在该四结构中。

Over 160 kilometers beneath the Earth's surface, the intense heat and pressure forced carbon atoms into that tetrahedral structure to form diamonds.

在距离地表160多千米深处，高温高压使碳原子们成为四结构，再进一步成钻石。

When the s orbital hybridizes with all 3 p orbitals it's called sp3 hybridization and it forms a tetrahedral shape.

当 s 轨道与所有 3 p 轨道杂化时， 称为 sp3 杂化，并成四状。

You can't have 2 orbitals mashing together in the same space, and sp3 orbitals are pretty much stuck in their tetrahedral structure.

你不能让 2 个轨道在同一个空间中混合在一起，sp3 轨道几乎停留在它们的四结构中。

Cycloalkenes also start at three carbons and get increasingly stable as more are added, though their double bonds make their molecules plainer instead of tetrahedral.

环烯烃也从三个碳原子开始， 并且随着添加更多碳原子而变得越来越稳，尽管它们的双键使它们的分子更简单而不是四。

Each lobe in that tetrahedral structure overlaps and bonds with one on an adjacent carbon atom creating a totally uniform, three dimensional network of carbon in every direction.

该四结构中的每个裂片都与相邻碳原子上的一个裂片重叠并键合，从而在各个方向上成完全均匀的三维碳网络。

Phosphate is made up of one central phosphorus atom surrounded by four oxygen atoms in a tetrahedral arrangement, like a mini pyramid, and has a charge of minus 3 and is written PO43-.

磷酸盐由一个位于中心的磷原子和四个氧原子组成，呈四结构，像一个小金字塔，电荷为-3，写成PO43-。

Now, phosphate is made up of one central phosphorus atom surrounded by four oxygen atoms in a tetrahedral arrangement, kind of like a mini pyramid, and has a charge of minus 3 and is written PO43-.

磷酸盐是由一个中心的磷原子和四个氧原子包围所组成，以四构造排列，有点像小金字塔，其电荷是-3写作PO43-。