Eigenellipse
本征椭圆; 特征椭圆
🗣️ 情景例句
How did you get to know her?
你是怎么认识她的？
No road is long with good company.
途有好伴，不觉路远。
She was choosing a book. He told her about the accident.
她正在选书。他将发生的情况告诉了她。