A secondary index in a pair of indexes used to locate a particular file record. The higher or mass index would often be considered the coarse index. 用來(lái)查找特定文件記錄的一對索引中的第二級索引。高一級的或涉及量大的索引通稱(chēng)為粗索引。
He was dressed in a pair of black trousers. 他穿著(zhù)一條黑色褲子。