The piece of furniture serves a dual purpose as a cupboard and as a table.

这件家具有两个用途，既作橱柜也作饭桌。

《牛津词典》

The Book of Revelation seems to have a dual purpose.

《启示录》似乎有双重目的。

youdao

Software development projects must satisfy a dual purpose for your company.

软件开发项目必须满足双重目标。

youdao

Such taxes have the dual purpose of raising revenue and decreasing the targeted conduct.

FORBES: Sneaker Taxes, Really? What Will They Tax Next?

They have the dual purpose of raising revenue and decreasing the targeted bad conduct.

FORBES: If Soda Tax Can Make It In NY It Can Make It Anywhere

When not in use, it attaches magnetically to the charging port, with the barrel button serving dual purpose as the magnetic connector.

FORBES: Links 6 Feb: Microsoft's Surface Pro Reviews. Not So Good Actually