Hyperboloid
[计] 双曲面
🗣️ 情景例句
The costs of college get higher every year.
学费逐年增加，越来越贵。
Promise little but do much.
少许愿，多做事。
Then she touched me lightly on my arm and made me burst into laughter.
然后她轻轻地触摸我的手臂，使我哈哈大笑。