您要查找的是不是：
- 变精度双向IS-粗集 variable precision two direction improper singular rough sets
- 变精度双向变异S-粗集与它的变异结构 Two-direction Variation S-Rough Sets of the Variable Precision and Its Variable Structure
- 变精度双向变异S-粗集 variable two-direction S-rough sets
- 双向IS-粗集 improper double direction singular rough sets
- 不变的 unchangeable
- 变精度粗集 variable precision rough sets
- 变小 lessening
- 变大 fill out
- 粗的 thick
- 保持不变 hold the line
- 并集 union of set
- 群集 throng
- 变老 ageing
- 变坏 go to the bad
- 产业集群 industry cluster
- 变心 cease to be faithful
- 杂集 miscellany
- 字集 character set
- 变暖 warming
- 全球变暖 global warming
