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
Where are you from?
你是从哪儿来的？
Each single crate is heavily padded and packed with 4 carboys.
每只木条箱内装4只大瓶子将空余处填满。
Though he managed to take a number of brilliant photographs, he could not stay near the volcano for very long.
尽管他设法拍了一些十分精彩的照片，但他却不能在火山附近停留太长的时间。