您要查找的是不是：
- 循环差族（CDF）cyclic relative difference family(CDF)
- 不相交的差族（DDF）disjoint difference family(DDF)
- 循环差阵cyclic difference matrix
- 循环差集cyclic difference set
- 族nationality
- 循环差集乘子Multiplier of cyclic difference set
- 松弛循环差集relaxed cyclic difference set
- 族的Goidelic; Lombardic
- 完全循环差集Perfect Cyclic Difference Sets
- 差分difference
- 标准差root-mean-square error (RMS error)
- 再循环recycle
- 脂肪族fatty group
- 差一点by a finger's breadth
- 族名nomen
- 差的inferiors
- 族裔race
- 不差little short of
- 这是条循环链。This is an endless chain.
- 蛮族tribe
