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
OK, Robbie, maybe you should watch him. Robbie
也许你得看着他点。
Let's begin now.
现在让我们开始。
This person recognized the words for river and guitar, and so Haley thought that his ancestor must have come from Gambia.