双周期性 Traditional 雙週期性 shuāng zhōu qī xìng 🔊 double periodicity + Keep this word Meanings shuāng zhōu qī xìng 雙週期性 (math.) double periodicity Its characters 双shuāngtwoHSK 3周zhōuto make a circuitHSK 2期qīa period of timeHSK 4性xìngnatureHSK 4