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 would have loved it.
她会喜欢这里的。
I beg your pardon?
你说什么？
Hello. Here's your eraser. Thanks very much!
给你橡皮。谢谢。