最近在做一笔业务，看到企业提交过来一份合同，合同中的货物定价条件如下：CFR NINGBO=ACP QURTERLY AVERAGE X 60% + SPOT QUARTERLY AVERAGE X 40%
其中（1）关于ACP的定义：ACP SHALL BE THE AVERAGE OF PX ASIAN CONTRACT PRICE FOR SHIPMENT QUARTER WHICH SHALL BE AGREED MONTHLY AMONG MAJOR PX PRODUCERS AND MAJOR END-USERS
（2）关于SPOT的定义：SPOT SHALL BE THE SHIPMENT QUARTER'S ARITHMETIC QUARTERLY AVERAGE OF CFR TAIWAN/CHINA PARAXYLENE MARK AS POSTED DAILY BY PLATT'S PETROCHEMICAL ALERT
看起来有些复杂，不知道哪位能否给出准确的翻译？在此先谢谢了！