单词	peta-
释义	Peta- A prefix meaning one-quadrillion (1,000,000,000,000,000 or 1015) The same as multiplying by 1015 Examples: • there are about a quadrillion ants on Earth (10 times more or less, no one knows exactly) Symbol is P Example: 12 Pm = 12 petameters = 12 quadrillion meters (12,000,000,000,000,000 m)
随便看	nought number number line number pattern number sense number theory numeral numerator numerical analysis obelus oblique oblique cone oblique cylinder oblique prism oblique pyramid oblong obtuse angle obtuse triangle octagon octahedron octal odd number odds odometer one dimensional

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。