Htv
abbr. 高空试验飞行器（High-altitude Test Vehicle）；高温硫化混炼硅橡胶（High Temperature Vulcanizing）；混合动力试验车（Hybrid Test Vehicle）；高压伏特计（High-Tension Voltmeter）；自动寻的试验飞行器（Homing Test Vehicle）
🗣️ 情景例句
Nice work.
干得好。
When did you leave?
你什么时候离开？
I didn't mind, because it was really cold in Moscow. There was thick snow everywhere!
我并不介意，因为莫斯科的天气非常寒冷。到处都可看见厚厚的雪！