单词	closed curve
释义	Closed Curve A curve that joins up so there are no end points. Example: an ellipse is a closed curve. So is a circle. You get a closed curve when you draw it without lifting your pencil and you end up where you started. See: Open Curve
随便看	partial product pascals triangle pattern payroll deduction pentagon pentagonal number pentagram pentahedron pentomino percent percentage points percentile rank perfect number perfect square perimeter period periodic function permutation perpendicular perpendicular lines perpendicular planes personal finance perspective peta- phase shift

数学辞典收录了1200条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。