【化】 active oil calculation
approve; but; can; may; need; yet
cull; extract; pick; pluck
availability; be good for; efficiency; hold; hold true; in effect
【计】 AV; significance
【经】 be available; in force
【经】 petroleum reserves
calculate; compute; cast; count; figure up; calculation; computation
【计】 calc; calculating; computing; tallying
【经】 calculate; calculation; computation; computing element; reckon
reckoning