理学 系统软件 释 system software 系统软件 计算机系统中提供系统级平台服务功能的软件集合，其处于整个计算机软件层次中的底层，最靠近硬件，负责控制计算机和外部设备，向上层软件提供某一类共性的功能支持，支持应用软件的开发和运行。
system software 系统软件
系统软件 释文 system software 系统软件
- tourism optimization management model,TOMM
- tourism pollution
- Tourism price
- Tourism public services
- Tourism Rate
- tourism resources
- tourism resources law
- tourism resources of China
- tourism safety and security
- Tourism satellite account
- tourism seasonality
- tourism services
- Tourism Shopping
- tourism spatial organization
- tourism stakeholder
- tourism strategy
- tourism system
- tourism translation
- Tourism Transportation
- tourism urbanization
- tourism zoning
- tourist area sign
- Tourist attraction
- tourist behavior
- tourist bicycle transportation facilities