Previously means at some time before the period that you are talking about. 先前地
adverb [时间副词] 以前地，先前地
He had first entered the House 12 years previously. 他12年前首次进入了众议院。
- previously 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 28 Patients and doctors
