一个视频搞清楚prime, primitive, primary, principal-第273天

词根学习第273天: prim, prin=首要 一个视频搞清楚prime, primitive, primary, principal-词根UP单词量第273天 1. 深入讲解prime, primitive, primary, principal 2. 分辨principle & principal 3. 分辨premier & premiere