0 Old HSK word(s):


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Natriumborhydrid (Chem) [peng2 qing1 hua4 na4] 硼氢化钠
Natriumcyanoborhydrid (S, Chem) [qing2 ji1 peng2 qing1 hua4 na4] 氰基硼氢化钠