Hyperboloidal
a. 双曲面的,北极的
🗣️ 情景例句
during the week--
在本 内
Good to begin well, better to end well.
善始好，善终更好。
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。