If the rule evaluates to true it performs an action which in this case is giving the customer a discount .

如果规则计算为 真，则执行一个动作，在本例中是给予客户 折扣。

If enterprises continue simply to adopt historical cost to account it will influence the true situations of enterprise assets and will give a great discount in useful quality of the financial report .

企业若继续单纯采用历史成本对此进行核算，势必会影响企业资产的 真实情况，企业财务报告的有用性也会因此 大打折扣。