0 Old HSK word(s):



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Hsk Characters:

HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual




geschlossener Stoffkreislauf, Stoffstrom (S) [cai2 liao4 xun2 huan2 de5 bi4 he2 guo4 cheng2] 材料循环的闭合过程