英语词汇free of charge upon request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	free of charge upon request
释义	free of charge — 白 upon request n— 应要 n upon request— 应...之请 free (of charge)— 免费
随便看	cover and protect cover and screw cover and secure cover and smooth cover and spread cover an extended cover any expenses cover any losses cover any shortfall cover a part cover a performance cover a period cover approach cover approximately cover a range cover a range from cover a range of topics cover a risk cover artist cover artwork cover a scope cover a short term cover a show cover a signature cover a situation

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。

free of charge —