商品房空置的现象的英文怎么说

商品房空置的现象的英文：
the vacancy problem in commercial housing

There are a few vacancies on the second floor.
在二楼有几个空房间。

We have a vacancy for a computer programmer.
我们有一个电脑编程师空缺。

The traveller searched in vain for a vacancy at motels.
旅行者无法在汽车旅馆找到空房间。

It was a complex problem.
这是一个复杂的问题。

Is the problem that easy?
问题有那么简单吗?

This is a prime problem.
这是一个有关质数的问题。

Commercial invoice is a document.
商业发票是一种单证。

We are not a commercial organization.
我们是一个非营利团体。

The play was a commercial success.
这出戏从营利角度看， 很成功。