Semimajor
axis(椭圆的)半长轴
🗣️ 情景例句
That's very nice of you, but I really can't.
你太客气了，可我真的非走不可。
He might have been held up in a traffic jam.
他可能因交通阻塞而耽搁了。
Yes. It's time for class. Let's go.
是的。上课的时间到了。我们走吧。