英语词汇voluntary basis and free of charge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	voluntary basis and free of charge
释义	free of charge — 白 free (of charge)— 免费
随便看	call alert calla lilies calla lily call allowance call a loan call a meeting call a mobile call a module call among call analysis call an ambulance call and put call and put options call an electrician call an expert call an option call-answer button call answering call any number call anyone on call any phone number call a phone number call a problem call a referendum call a request

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 —