n. 椭圆
网络 椭圆形; 椭圆弧; 画椭圆
If I make the total energy positive, it´s not an ellipse.
如果我让总能量为正,它就不是一个椭圆了。
Man is not a circle with a single centre; he is an ellipse with a double focus.
人并不是只有一个圆心的圆圈;他是一个有两个焦点的椭圆。
If this is an ellipse around the Earth, this would be perigee and this would be apogee.
如果这是一个围绕地球的椭圆形,那么这是近地点,这是远地点。
The main axis of the planet´s orbital ellipse shifts each time when it goes around the sun.
当行星绕太阳运行时,其轨道椭圆的主轴每次都会改变。
One characteristic of Earth´s orbit is its eccentricity, the degree to which the orbit is an ellipse rather than a circle.
地球轨道的一个特点是它的离心率,也就是轨道是椭圆而不是圆形的程度。