Eigenellipse
本征椭圆; 特征椭圆
🗣️ 情景例句
Hi, Betty. I'll be at five five five...seventeen twenty.
好 Betty 我的号码是555-1720。
They called us just as we were having dinner.
当我们正在吃晚饭，他们就打电话给了我们。
for the monotonous rhythm of the wheels clicking on the rails soon lulls you to sleep.
车轮与铁轨间单调的嘎喳声很快就会送你进入梦乡。