[mass noun](formal)the action of demanding and obtaining something from someone, especially a payment or service (正式)索要;征收 he supervised the exaction of tolls at various ports. 他监督各个港口收取通行费。 ■[count noun]a sum of money demanded in such a way 索要的钱财 ■[count noun]an act of demanding unfair and exorbitant payment; an act of extortion 敲诈;勒索
语源
late Middle English: from Latin exactio(n-), from exigere 'ascertain, perfect, enforce' (see exact)