The average monthly tab comes to $168.50. 每月平均费用达到一百六十八点五美元。
In any case, even as the CME has grown rapidly in recent years, it has steadily lowered the average fee it charges per contract. 不管怎样，甚至当芝加哥商业交易所在最近几年内快速增长的时候，它也稳定地降低对每个合约所收取的平均费用。
Average cost of the system queries that could be reduced by the index in the group. 可通过组中的索引减少的系统查询的平均成本。
At the peak of efficiency, the marginal cost of production equals the average cost of production. 在效率的峰值点，生产的边际成本等于生产的平均成本。
