1.circularrelation  2.recursionrelation  

循環(huán)的英語翻譯：

cycle; recur; circle; rotate; circulation; repetition; revolution
【計(jì)】 DO-loop; for-loop; loop; unwinding
【化】 recirculate
【醫(yī)】 circuIation; cycle
【經(jīng)】 cycle; revolving; rotation

關(guān)系的英語翻譯：

relation; relationship; appertain; bearing; concern; connection; term; tie
【計(jì)】 relation
【醫(yī)】 rapport; reference; relation; relationship