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
But who's going to pay for all of this?
但谁来为这些付钱呢?
I'll call you up later.
我稍后会打电话给你。
The former Prime Minister, Mr.Wentworth Lane, was defeated in the recent elections.