Semimajor
axis(椭圆的)半长轴
🗣️ 情景例句
Jazz music is performed at many dinner parties.
在很多宴会派对里都有爵士乐的演奏。
Did you go to the school last night?
你昨晚去学校了吗？
Yes, I look young,too!
我看上去也很年轻。