Eigenellipse
本征椭圆; 特征椭圆
🗣️ 情景例句
Not at all. Check it, please.
好的，请检查。
Necessity is the mother of invention.
穷则变，变则通。
I don't know why he's in a tailor's shop. Just look at his clothes!
真不懂他为什么进服装店。瞧他这身打扮！