0 Old HSK word(s):


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Hsk Characters:
HSK -Characters and beyond:
from: Universala Vortaro, Zamenhof









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1.21 Ökologie, Umweltschutz Schadstoff + Pollutant + 污染物 +
1.21 Ökologie, Umweltschutz schadstoffarm + pollutant + 污染物 +