1.
Two Systems in Decision-making and Reasoning: Heuristic System and Analytic System;
决策与推理的双系统——启发式系统和分析系统
2.
double frequency both side band transmission
双频双边带传输系统
3.
microprocessor two-circuit system
微处理机双电路系统
4.
two-parameter adaptive control system
双参数自适应控制系统
5.
Ariane Dual Launching System
阿丽亚娜双体发射系统
6.
magnetic amplifier two-speed servosystem
磁放大器双速伺服系统
7.
hyperbolic electronic navigation system
双曲线电子导航系统
8.
dual cycle boiling water reactor system
双循环沸水反应堆系统
9.
double precision automatic interpretive system
双精度自动翻译系统
10.
AC single phase two wire insulated system
交流单相双线绝缘系统
11.
two-way radio system
双向无线电通信系统
12.
bi-directional folded-type prover system
双向折叠型标定系统
13.
a two-tiered system,ie one with two distinct levels
双重系统（有两个层次的）.
14.
electric double-track railway system
电气化双轨铁路系统
15.
DDSS Double Dynamic Suspension System
双悬浮动态减震系统
16.
radio hyperbolic navigation system
无线电双曲线定位系统
17.
The Hydrodynamic Capability Research on the Propulsive System of the Ship with Twin-propellers and Twin-rudders;
舰船双桨双舵推进系统的水动力研究
18.
Dual-port RAM and application in systems of dual-CPU
双口RAMIDT7009及其在双CPU系统中的应用