安装需要额外付费吗？

Do you have to pay extra for ___installation?

最后但同样重要的是，学生们要求安装一台饮料机——那对他们来说会非常方便。

Last but not least, students asked for the ___installation of a beverage machine - that would be really convenient for them.

新软件的安装花了几个小时。

The ___installation of the new software took several hours.