Be careful with that metal sheet, it has many sharp jagged edges along the edges.

jagged 是形容词，来自动词 jag（使成锯齿状），意思是"参差不齐的、锯齿状的"。 edges 是名词 edge 的复数形式，edge 指"边缘、边界"。 jagged edges 指"锯齿状的边缘"，形容边缘不整齐、有尖锐突起的样子。