• OP-opinion（观点类词）: 如 beautiful, ugly, expensive, cheap 等
• SH-size &shape（大小、形状类词）: 如 long, short, round, square 等
• A-age（年龄、新旧类词）: 如 new, old, young 等
• C-color（颜色类词）: 如 black, white, red, yellow 等
• O-origin（国籍、地区类词）: 如 Chinese, English, Italian, Japanese 等
• M-material（材料类词）: 如 metal, silk, plastic, leather 等