periodic inventory的用法和样例：
例句
- The accounting recording procedures are different under the periodic inventory system and the perpetual inventory system.
定期盘存制和永续盘存制的会计入账程序是不同的。 - An alternative to the perpetual inventory system which eliminates the need for recording the cost of goods sold as sales occur.
定期盘存制是与永续盘存制相对应的方法，它不需要在销售发生时记录已销存货成本。
