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
- directional bond
- directional circulation drilling
- directional collapse
- directional control of hydraulic System
- directional control valve
- directional coupler
- directional couplers
- directional crystal superalloy casting technology
- directional curvature tensor
- directional data
- directional derivative
- directional design and synthesis
- directional diagram
- directional differentiation
- directional distribution
- directional drilling
- directional duality
- directional duality principle
- directional emitter
- directional exit sign
- directional explosive echo ranging
- directional filter banks
- directional fragmentation warhead
- directional gamma-ray radiometer
- directional gene knock-out (editing) on aquatic animal