单词	arithmetic progression
释义	arithmetic progression noun : a progression (such as 3, 5, 7, 9) in which the difference between any term and its predecessor is constant Example Sentences Recent Examples on the Web This kind of sequence is called an arithmetic progression. Quanta Magazine, 6 Feb. 2019 In mathematics, this is called an arithmetic progression—a sequence in which the numbers increase by the same amount at each step. Eugenia Cheng, WSJ, 5 Dec. 2018 Word History First Known Use 1704, in the meaning defined above
随便看	lockmen Locknit locknut locknuts lockout lockouts lockpick lockpin lockram lockrams lockrings locks locks (up) locks away locks horns locks out locks up lockset locksets locksman locksmen locksmith locksmithing locksmithings locksmiths

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。