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
- nonterminal symbol
- nonterminating
- nonterminating continued fraction
- nonterminating decimal
- non-thermal background
- non-thermal bremsstrahlung
- non-thermal electron
- non-thermal emission
- non-thermal particle
- non-thermal process
- non-thermal proton
- non-thermal radiation
- nonthermal radiation
- non-thermal radio halo
- non-thermal radio radiation
- non-thermal radio source
- non-thermal source
- non-thermal spectrum
- non-thermal velocity
- non-thermodynamic equilibrium
- non-thermodynamic equilibrium, NTE
- nonthyroidal illness syndrome
- non-timber forest
- non-timber forest produces
- non-timber forest products management certification