Seds
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
Who's this?
你是谁？
A servant is known by his master's absence.
主人不在可以看出仆人的品行来。
They must keep their hands behind their backs.
他们得一直将手放在背后。