made with metal studs fixed into the surface in a pattern

a studded dog collar/leather jacket 带饰钉的狗项圈／皮夹克

If something is studded with many objects of the same type, those objects are arranged regularly across it, or across the surface of it.

a baked ham studded with cloves 点缀着丁香的烤火腿

Elaine looked up at the black, velvety sky studded with tiny, twinkling stars. 伊莱恩抬头看着漆黑的、丝绒般的天空，闪闪繁星点缀其中。