and then kepler came with these laws that said basically that planets move in an ellipse around the sun, and that they move in a very specific way along that ellipse.
接着开普勒提出了他的定律,他说行星基本上是绕太阳作椭圆运动,它们在椭圆上有特殊的运动规律。
the current national christmas tree was planted on the ellipse in 1978.
现在的这棵国家圣诞树是1978年在椭圆广场栽种的。
an ellipse is asort of a squashed circle, or an elongated circle, depending on how you look atit.
椭圆就是一个被压扁的圆,或者一个被拉长的圆,这取决于你怎么看它。
another name foran ellipse is an oval.
椭圆的另一个名字叫「卵形的」。
it「s good to use a reference for the shape, such as drawing an ellipse within which the fire will remain and you can send the flames up to any of the edges of this ellipse.
比较好的做法是用一个参照物,比如画一个椭圆形让火焰保持在这个范围之内,而且你可以让火苗窜到椭圆的边缘处。
the mainaxis of the planet」s orbital ellipse shifts each time it goes round the sun.
这颗星球每围太阳绕行一周,它的椭圆形轨道的中轴就变化一次。
and the sun is not at the center of the ellipse the sun is to one side.
太阳并不是在椭圆形的中间而是在一边。
in the 1840s an astronomer called urbain le verrier noticed there was something wrong with the orbit of mercury. the main axis of the planet's orbital ellipse shifts each time it goes round the sun.
1840年一位叫做勒威耶的天文学家发现水星的轨道有些奇怪:其椭圆轨道的主轴每当靠近太阳的时候会产生偏移。
if this is an ellipse around the earth, then this would be perigee and this would be apogee.
如果这是一个围绕,地球的椭圆形轨道,那么这是近地点,这是远地点。
the collaboration is shown using the classifier notation (a partitioned rectangle), rather than the dashed ellipse notation.
协作通过归类符号(一个被划分的长方形)来展示,而不是通过虚线椭圆形符号被展示。
but, you know, an ellipse is just a squished circle.
但是,你们知道,椭圆只是一个被压扁了的圆而已。
click on the ellipse tool (u) and select the paths icon in the options menu (usually at the top of the screen).
点击椭圆工具(u),并选中选项菜单(通常位于屏幕上部)中的路径图标。
yes? how do you parametrize an ellipse in space?
怎样参数化空间上的椭圆曲线呢?
it could be a small piece of it. it could even be, to trick you, maybe an ellipse in there or a triangle in there or something like that.
它可能只是整个平面的一部分,奇怪一点的话,它可能是椭圆形的,也可能是三角形的或是其他什么形状。