我们看到了一系列的商店和房子，在海边有一或两层。

We saw a range of shops and houses with one or two storeys by the sea shore.

youdao

是的。我们的公司有两层，这幢楼的六楼和七楼。

Yes, our company has two floors, the 6th and 7th floor in this building.

youdao

So there are two electron configurations in the n equals one shell, if we follow according to the selection rules that we spelled out last day.

如果根据上次课,我们阐明的原子光谱选择定则，我们就会知道在n等于1的那一层,有两种电子图像构型。

麻省理工公开课 - 固态化学导论课程节选