Semimajor
axis(椭圆的)半长轴
🗣️ 情景例句
My friends will get a big kick out of getting these.
送劳力士，我同事准乐死了！
Yes, I do.
是的，我有。
An even harder situation is to be on the platform in good time for a train and still to see it go off without you.
更难堪的情况是虽然及时赶到站台上，却眼睁睁地看着那趟火车启动，把你抛下。