rule of cost or market

• [经] 成本或市价(孰低)的规则

rule of cost or market的用法和样例：

例句

1. Even the best of men ignored that simple rule.
   甚至最优秀的人也忽略了那条简单的规则。
2. However, no rule exists for Roundup Ready crops.
   不过，对于抗草甘磷作物，目前还没有既定的规则存在。