The building is still under construction.

这座大楼仍在建造中

The railway is still under construction.

这条铁路仍在建设之中。

The hotel is still under construction.

旅馆还在兴建中。

The reservoir is under construction.

水库正在建设。

A new railway is under construction.

正在修建一条新铁路。

The new railway is under construction.

新铁路正在修筑之中。