意思是:这些沙子来自近旁的一处古老山脉,那山脉随着时间的流逝曲线渐消,趋于平稳. mountain range :山脉 close by :在近旁,作mountain range 的后置定语 that flattened out over time:做修饰mountain range 的定语从句,补充说明山脉的情况.
The sand had come from an ancient mountain range fairly close by that flattened out over time. 这是一个主从复合句,主句是:The sand had come from an ancient mountain range fairly close by ,其中 fairly close by 为形...
The sand 是主语,had come from 是谓语,an ancient mountain range “一座古老的山脉”是宾语,close by that flattened out 宾补,意思是“慢慢夷为平地”,补充说明前面“古老的山脉”,“fairly”adv. 修饰 close by that flattened out 。 over time 是在句中做时间状语,意思是“随着...