Questioning and bewilderment

The word 'vacuum' did not exist in the technological civilization of the isodarian people.

"A vacuum is a world without air ..." Xu Zhi replied coolly.

what!!?

Carolyn was greatly shocked.

She couldn't help but exclaim in surprise. She walked nervously around the elegant and quiet mecha virtual hall, her expression unusually serious. Such an abnormal action caused the staff around to turn their heads to look at her from time to time.

Caroline's voice trembled. the ancient gods, a world without air. What is it like!?