【电】 Vinyl resin
second
【建】 acetonitrile; ethane nitrile
rare; scarce; sparse; watery
base; basic; foundation; key; primary; radix
【化】 group; radical
【医】 base; basement; group; radical
colophony; pitch; resin; rosin
【化】 resin
【医】 peucine; pitch; resin; resina