{ki'i} and {ra'a}

[Yanis Batura <ybatura@mail.ru>]

{ki'i} and {ra'a} are two BAI cmavo, derived from {ckini} and {srana},
respectively. While there is a clear difference between the two gismu,
I cannot grasp very well the difference between the two cmavo. Can
anyone explain me it and provide some examples where {ki'i} and {ra'a}
don't mean the same?

(There is a BPFK section shepherded by R. L. Powell and where both
are, but it didn't help me much:
http://www.lojban.org/tiki/tiki-index.php?page=BPFK+Section%3A+Relational+sumtcita&bl)

a'u mi'e .ianis