Semimajor
axis(椭圆的)半长轴
🗣️ 情景例句
I have a picture of Grandpa and Dad and me in my wallet.
我皮夹里有一张照片，是爷爷、爸爸和我在一起照的。
What do you think of the proposal?
你的看法如何？
If you would only try, you could do it.
只要你肯尝试，你一定能做这件事。