麻烦哪位老师告诉我这些简称的中文意思

TCS: Tanking Control System 油罐装油控制系统;
Telemetry and Command System 遥测和指挥系统;
Thermal Control System 热控制系统;
Traffic Control Station 交通管制站
IRS: Internal Revenue Service 美国国税局
DSS: Deep Space Station太空站;
Deep Submergence System 深潜系统;
Disc Storage System 磁盘存贮系统;
Dynamic System Synthesizer【计】动态系统合成器EC： Eastern Central [英](伦敦)东部中央邮(政)区;
Established Church [英]【宗】国教;
Earth Current 接地电流;
East Coast 东海岸[美];
Eucador 厄瓜多尔[拉美];
Educational Committee 教育委员会;
Effective Concentration 有效浓度;
Elasticity Coefficient 弹性系数;
Electronic Computer 电子计算机;
Electronically Controlled 电子控制的;
Enamel-Covered (wire)漆包的(导线);
Erection Computer (火箭起飞前的)安装计算机;
Error Correcting 误差校正;
Ethyl Cellulose 乙基纤维素;
European Communities 欧洲共同体;
Extension Courses 函授课程
CAI: Computer-Assisted [Computer Aided] Instru