循环节,反复语句
Repetend \Rep`e*tend\ (r?p`?-t?nd"), n. [L. repetendus to be repeated, fr. repetere to repeat.] (Math.) That part of a circulating decimal which recurs continually, ad infinitum: -- sometimes indicated by a dot over the first and last figures; thus, in the circulating decimal .728328328 + (otherwise .7..8...), the repetend is 283.