点击下方单词,选择对的这个单词
形容词
1. 免费地;无偿地If something is done or provided gratis, it does not have to be paid for.
1. without payment
e.g. I'll give you this gratis
Synonym: for freefree of charge
多通过句子记忆单词,而不是单独死记硬背。