In British, French, and German usage, one milliard equals 109. American usage does not have a number called themilliard, instead using the term Billion to denote 109.See also Billion, Large Number, Million, Trillion
数学辞典收录了8975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。