但是限制人们不能以现有的市场价格购买超过50 kg的大米。
But the limit would not buy much more than a 50kg sack of rice at prevailing retail prices.
提出了一种基于供求分析的团险定价模型，通过供给与需求达到平衡来确定保险市场价格，弥补了现有的方法中没有考虑保险需求及需求对价格影响的不足。
A group insurance pricing model based on supply and demand analysis is presented. This price is a market price that can be obtained when supply and demand of insurance is balanced.
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