Fighting bulls are selected primarily for a certain combination of aggression, energy, strength, and stamina.

China was selected primarily for its market size and potential.

The rock was primarily selected for its proximity to the rover, rather than any intrinsic scientific value.

The helium is selected primarily because it penetrates small leaks readily.

Saturn required only one new factory, for the largest of the proposed lower stages, and was selected primarily for that reason.

Certainly the principals seemed to have been selected with visual rather than vocal concerns primarily in mind.

Foreign nationals are selected primarily by their governments, following bilateral agreements with the Greek state.

The members of the paid fire department were primarily selected from the prior volunteers.

These were selected primarily as the oldest and most historically notable structures in the historic district.

The area was selected primarily because of underground water supplies and its history of fires.