primitive

The hikers built a primitive shelter using only tree branches and large leaves.

(Chinese) 徒步旅行者仅用树枝和大叶子搭了一个原始的避难所。

In the primitive stages of computing, machines filled entire rooms and were very slow.

(Chinese) 在计算机的原始阶段，机器占据了整个房间且速度非常慢。