理学 操作系统 释 basic input/output system 基本输入输出系统 计算机系统中通常被固化在ROM中的一组程序，包括基本输入输出程序、开机自检和硬件初始化程序、操作系统引导程序以及运行时服务程序。
系统软件 操作系统 释文 basic input/output system, BIOS 基本输入输出系统
- mean synodic motion
- mean synodic period
- mean synodic revolution
- mean synodic rotation
- mean synodic year
- mean tangent diameter
- mean term
- mean term of proportion
- mean-tidal system
- mean tide
- mean time
- mean time between failure
- mean time between failures
- mean time between failures, MTBF
- mean time between failures，MTBF
- mean-time clock
- mean time to dangerous failure
- mean time to failure
- mean time to failure, MTTF
- mean time to first failure
- mean time to repair
- mean time to repair, MTTR
- mean-time type time-signal
- mean tone temperament
- mean transmission rate