Hta
abbr. heavier-than-air 比空气重的（飞行器）; high temperature accelerant 高温促进器
🗣️ 情景例句
In about half an hour. Why?
大约半个小时。为什么问这个？
Yes, we should try to contact more.
是的，我们应该联系多点。
The city was equipped with a drainage system, for a great many clay pipes were found beneath the narrow streets.
城里甚至还敷设了排水系统，因为在狭窄的街道底下发现了许许多多陶土制作的排水管道。