实验室的设备相当简陋。

The equipment in the lab was quite ___primitive.

游客经常抱怨偏远地区简陋的住宿条件。

Tourists often complain about the ___primitive accommodations in remote areas.

他的绘画技巧还很原始，但他在进步。

His drawing skills are still ___primitive, but he's improving.