Semimajor
axis(椭圆的)半长轴
🗣️ 情景例句
When would you like to return?
你打算什么时候回来？
From hearing comes wisdom; from speaking, repentance.
多听增智慧，多言生后悔。
Look at the snow! It's quite light.
瞧这雪！这么小。