Semimajor axis
（椭圆的）半长轴
🧩 词语组成解析
axis(椭圆的)半长轴
🗣️ 情景例句
I have to sign copies of my book for a lot of people
我还必须为许多人在我的书上签名
Good to begin well, better to end well.
善始好，善终更好。
Neither, thanks. I think I'll just have a glass of water.
那个都行。我想还是来一杯水吧。