【化】 dehydrohalogenation
doff; escape from; miss out; pull off; take off
【医】 de-; des-
【化】 halogenate; halogenation
hydrogen
【医】 H; hydr-; hydro-; hydrogen; light hydrogen
affect; effect; intention; action; motive; operation
【医】 action; effect; process; role
【经】 role