astroid

常見例句

• Construct the astroid as the envelope of a family of lines.
  作由線族包絡(luò)線所形成的星狀線.
• Construct an animation of three concurrent tangents of the astroid.
  建構(gòu)一動態(tài)繪圖：展示星狀線共點(diǎn)的三切線。
• Construct an animation showing the inscribed ellipse of an astroid.
  建構(gòu)一動態(tài)繪圖：展示星狀線的內(nèi)切橢圓。
• Obviously, a line of astroid nebula is a result which the star old age evolves.
  可見，行星狀星云是恒星晚年演化的結(jié)果。
• Show how a deltoid of maximal size slides inside a stationary astroid.
  在固定不動的星狀線內(nèi)，有一個最大的三角線在其間滾動。
• Construct rotating cardioid and astroid while remaining orthogonal to each other.
  作旋轉(zhuǎn)的心臟線和旋轉(zhuǎn)的星狀線，且彼此維持正交。
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