primitive

adj. /ˈprɪm.ə.t̬ɪv/ B1

原始的；简陋的

Relating to human society at a very early stage.

仙境例句

The Dodo's race-course was primitive, just a rough circle marked out on the ground.

渡渡鸟的跑道很简陋，只是在地上随手画出的一个圈。