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've heard a great deal about you.
久仰大名。
Delays are dangerous.
坐失良机必有忧患。
How did you do on your test?
你这次考试的结果如何？