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
We will help your children in learning lessons in their free time.
我们可以帮助您的孩子在他们空闲时学习功课。
Try not to be so timid when you speak.
你讲话的时候不要那么紧张。
she rang up her daughter and asked for her help in what she described as a little spot of bother.
她只得打电话向女儿求援，说她碰到了一点儿小麻烦。