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0 Old HSK word(s):
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
Hsk Characters:
HSK -Characters and beyond:
Gb
Big5
Eng
Rad
Mega
Triple
Multilingual
from: Universala Vortaro, Zamenhof
Dummy-Variable (S, Math)
[zi4 you2 bian4 liang4 he2 yue1 shu4 bian4 liang4]
自由变量和约束变量