0 New HSK word(s):

0 Old HSK word(s):

臀 [tun2]

Gesäß, Hintern, Popo (S)
亚历山大波波夫 [ya4 li4 shan1 da4 bo1 bo1 fu1]

Alexander Stepanowitsch Popow (Eig, Pers, 1859 - 1905)
脂多糖 [zhi1 duo1 tang2]

Lipopolysaccharid