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1 Old HSK word(s):
☊
钻
研
*
*
B
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
钻
drill, bore / pierce / diamond
研
grind, rub / study, research
Hsk Characters:
HSK -Characters and beyond:
Gb
Big5
Eng
Rad
Mega
Triple
Multilingual
from: Universala Vortaro, Zamenhof
etw. ergründen (V)sich gründlich mit etw. befassen
[zuan1 yan2]
钻研