Semimajor
axis(椭圆的)半长轴
🗣️ 情景例句
What's the best way to learn English?
学习英语最好的方法是什么？
Open your book,please.
请把书打开。
It is animals and plants which lived in or near water whose remains are most likely to be preserved,
只有生活在水中或水边的动植物尸体最有可能被保存下来，