These two are going to smear laterally.

这两根键只能侧面重叠。

麻省理工公开课 - 固态化学导论课程节选

The other two are going to smear laterally.

另两根是从侧面重叠的。

麻省理工公开课 - 固态化学导论课程节选

The other two have to do something different.

另两根有所不同。

麻省理工公开课 - 固态化学导论课程节选

What are the other two going to do?

那另外两根呢？

麻省理工公开课 - 固态化学导论课程节选