HFSS 3D modeling, HFSS 设计3D

I wanna design unique-shaped model in HFSS, Do I have to use other tools to design it first then Import it into HFSS ?
It seems like HFSS has limited source of shape models, including rectengular, circular, ......
我想用HFSS设计 形状很特别的 3D model. 我必须用别的软件设计好然后import 吗?

seriously guyssssssssssss ....................