Common

• International
• Economics
• Population
• Law
• Energy consumption
• Pseudoscience
• Architecture
• Stock
• Occupation
• Clothing
• Housing
• Think tank | Britannica
• Skyscrapers
• Eyewear

Nature

• Insects
• Trees
• Plant
• Fibers
• Mammals

Edible

• Spice
• Condiment
• Pastry
• Cuisine

Tool

• Internet
• Printer
• Phone
• Pistol
• Tape

标准

• 塑料分类标志
• 电池类型
• 胶带
• 标点符号
• 希腊字母
• 日历
• 字体