Ssts
abbr. signaling and supervision techniques study 信号传送与监听技术研究; space surveillance and tracking satellite 空间监视与跟踪卫星; space-based surveillance and tracking system 天基监视与跟踪系统
🗣️ 情景例句
She flunked her English examination.
她的英语考试失败了。
Gather ye rosebuds while ye may.
有花堪折直须折。
I was very tired this morning. I couldn't get up.
我早上很累，起不来。