astroid

astroid

1. astroid shaped

adj. 星形的

2. 8.Construct rotating cardioid and astroid while remaining orthogonal to each other.

作旋转的心脏线和旋转的星状线，且彼此维持正交。

3. Construct the astroid as the envelope of a family of lines.

作由线族包络线所形成的星状线.

4. Obviously, a line of astroid nebula is a result which the star old age evolves.

可见，行星状星云是恒星晚年演化的结果。

5. Show how a deltoid of maximal size slides inside a stationary astroid.

在固定不动的星状线内，有一个最大的三角线在其间滚动。

6. The 13-year old made his discovery as part of a regional science competition for which he submitted a project entitled: "Apophis -- The Killer Astroid.

如果这颗小行星于2029年撞上一颗卫星，它的运行轨道就会改变，那么它很可能将在2036年下一次靠近地球时与地球相撞。

7. projective astroid

射影星形线

8. 10.Construct an animation of three concurrent tangents of the astroid.

建构一动态绘图：展示星状线共点的三切线。

9. 1.Construct an animation showing the inscribed ellipse of an astroid.

建构一动态绘图：展示星状线的内切椭圆。

10. 2.Construct an animation showing the tangent sweeping out the interior of the astroid.

建构一动态绘图：展示星状线的切线所有扫掠过的内部轨迹。

11. 11.Construct an animation displaying an astroid sliding along three fixed concurrent lines meeting at 120 degrees.

建构一动态绘图：展示星状线的滚动，沿著共点及间隔120度的三切线。

12. 8.Construct a linkage to draw the astroid.

建构一连杆绘制星状线。

13. According to the shape, in Milky Way's nebula may divide into fills the air the nebula, a line of astroid nebula and so on several kinds.

按照形态，银河系中的星云可以分为弥漫星云、行星状星云等几种。

14. oblique astroid

斜星形线

15. regular astroid

正则星形线

16. The line of astroid nebula appearance spits a little likely the smoke rings, the center is spatial, moreover often has a very bright star.

行星状星云的样子有点像吐的烟圈，中心是空的，而且往往有一颗很亮的恒星。