【化】 methylbenzyl ether
oxygen
【医】 o; O2; oxy-; oxygen; oxygenium; phlogisticated gas
base; basic; foundation; key; primary; radix
【化】 group; radical
【医】 base; basement; group; radical
firedamp; methane
【化】 methane
【医】 firedamp; marsh gas; methane; methyl hydride; phenylmethane
【经】 marsk