free of charge
adverb uk/ˌfriː əv ˈtʃɑːdʒ/ us/ˌfriː əv ˈtʃɑːrdʒ/
免费地
without having to pay
You can download the materials free of charge from our website. 你可以在我们的网站上免费下载这些资料。
The classes are offered free of charge. 这些课程是免费的。
free of charge
adjective uk/ˌfriː əv ˈtʃɑːdʒ/ us/ˌfriː əv ˈtʃɑːrdʒ/
免费的
available at no cost
Admission to the museum is free of charge. 博物馆免费入场。