详细解释:n. 惯例, 习惯, 使用, 利息
【经】 惯例付款期
英语解释：
名词 usance:
the period of time permitted by commercial usage for the payment of a bill of exchange (especially a foreign bill of exchange)(economics) the utilization of economic goods to satisfy needs or in manufacturing同义词：consumption, economic consumption, use, use of goods and services