金属材料 (jīnshǔ cáiliào): Refers to metallic materials used in various industries such as construction and manufacturing.
高分子材料 (gāofēnzǐ cáiliào): Polymer materials that have long chains of repeating units, commonly found in plastics.
纳米材料 (nàmì cáiliào): Materials with structures at the nanoscale level, which exhibit unique properties due to their small size.