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
- Rainwater, James
- rainwater reuse treatment system
- rainwater system design
- rainwater utilization
- Rainy Day
- Raipur
- raise
- raise boring machine
- raise-boring method
- Raised-and-painted Gauze of Western Han Dynasty
- raised establishment
- raise driving
- Raise the Red Lantern
- raising
- Raising Havoc in Heaven
- raising into a symbolic power
- raising machinery
- raising of an index
- Raising of social medical insurance fund
- raising operator
- raising rivals’costs
- raising seedling by sowing
- raising seedling by transplanting
- raising system of egg duck on net-floor in closed house
- raising to a power