英语词汇be effective over an extended period怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	be effective over an extended period
释义	be effective over an extended period— 长效 See also: be effective [idiom.]— 行之有效
随便看	legitimization legitimized through legitimize through legless leg levers leg measure leg Movement leg muscle leg. no. leg. no. e 910-208 12 Lego Lego Lego Batman Lego building Lego building block leg of leg of a flight leg of air or sea voyage leg of a journey leg of a mission leg of flight leg of Lamb leg of mission leg of the journey leg of the race

英汉双解词典包含2273206条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。

be effective over an extended period—