primary qualities
plural noun
1- Philosophy properties or qualities, such as size, motion, shape, number, etc., belonging to physical matter independently of an observer【哲】（指体积, 运动, 形状, 数目等）第一性的质。
1.1
- the four original qualities of matter (hot, cold, wet, and dry) recognized by Aristotle, from which other qualities were held to derive（亚里士多德划分的物质的冷、热、干、湿）四态。