abbr. system effectiveness data system 系统效能数据系统; sequential dual-scanning system 顺序双扫描系统; support equipment data system 支援设备数据系统; space electronic detection system 空间电子探测系统
🗣️ 情景例句
I know so.
我确定知道是这样。
The worker is pounding steel pipes to mend the leakage of water.
管道工为了修缮漏水而敲打着下水道的铁管。
Please get those things off, sir, and throw them into the fire.