tetrad 四元组，四分体
four combination 四元组 quad 四角形区域，四元组 quadruple 四元组；四重的，四倍的 quadruplet 四元组 quaternary 四进制的，四元的；四元组 tetrad 四元组 vierbein 四元组
系统软件 语言与编译 释文 quadruple 四元组
- motor
- motor anticipation
- motor bath
- motorboat racing
- motorboat racing place
- motor calman filter
- motor closed-loop control
- motor closed-loop control system
- motor combustion instability
- motor control
- motor control theory
- motor cooling
- motor cortex
- motor-cross and multiple stage motorcycle race
- motorcycle
- motorcycle engine
- motorcycle patrol
- motorcycle sport
- motorcycle tour race
- motorcycle track racing
- motor decision
- motor development
- motor direct torque control
- motor disorders
- motor drive