【电】 forward-backward counter
former; forward; front; preceding; priority
【医】 a.; ante-; antero-; fore-; pro-; proso-; ventri-; ventro-
always; at; be partial to; direction; face; out; to; toward
【医】 ad-; ak-; ob-
a; an; each; one; per; same; single; whole; wholehearted
【医】 mon-; mono-; uni-
【计】 backward counter