三级存储器 meaning in Chinese

third level storage
third-level storage

Query processing on massive data stored in three layers storage system is studied in this dissertation . queries are divided to three kinds which are d - query , t - query and td - query base on where the data accessed is stored ( on the disk or on the tertiary storage )
根据需要访问的数据存储位置的不同(磁盘上还是第三级存储器上) ,将三级存储系统中海量数据的查询分为d - query 、 t - query和td - query三类。
Because the data accessed by d - queries is stored on the disk , so we can use the method of conventional database to process them . we mainly study method for processing queries on tertiary storage ( t - query and td - query ) later . first , a new way to process queries on tertiary storage is advanced after
由于d - query访问的数据存储在磁盘上,可以采用传统数据库处理查询的方法对其进行处理,因此本文随后重点研究了第三级存储器查询( t - query和td - query )的处理方法。