Btt
abbr. Busy Tone Trunk 忙音中继线
🗣️ 情景例句
Have a safe trip home.
路上小心点。
I saw him at the supermaket.
我在超级市场看到他。
employing full-time technicians and run on specially-written software.
雇用专职的技师，而且得用专门编写的软件才能运行。