0 New HSK word(s):
0 Old HSK word(s):
孪生 [luan2 sheng1] Zwillingsgeburt (S, Med)
孪生素数 [luan2 sheng1 su4 shu3] Primzahlzwilling (S)
孪生子 [luan2 sheng1 zi3] doppelt