The spacecraft is the protective 'spaceship' that enables the precious cargo (that is, the rover!) to travel between Earth and Mars.
Myasishev Project 48: An early Soviet attempt to develop reusable spacecraft ; Raketoplan/Kosmoplan: Vladimir Chelomei's early attempt to develop reusable.
It is the only spacecraft ever to orbit two destinations beyond Earth and the only to orbit an object in the main asteroid belt between Mars and Jupiter. The giant.