只有一部分A离子处在四面体的位置上。

Only a fraction of the A ions are in tetrahedral sites.

youdao

一个完满的理论必须能够解释甲烷中为什么所有hch角都具有四面体的特性值。

A satisfactory theory must be able to explain why in methane the HCH angles all have the characteristic tetrahedral value.

youdao

研究了体视投影的复原问题，提出了根据两个完全四点形为体视投影恢复三直角四面体的方法。

The problem of reconstruction of a stereo projection is studied. The method of reconstructing a trirectangular tetrahedron from a stereo projection made up of two complete quadrangles is put forward.

youdao

And so now I have hydrogens at the four corners of a tetrahedron.

放在碳正四面体,的四个角上。

麻省理工公开课 - 固态化学导论课程节选

So, this forms a tetrahedron, which forms the sp3 hybrid orbitals.

这就形成了一个四面体，它是由sp3杂化轨道形成的。

麻省理工公开课 - 固态化学导论课程节选