previously
例子
I had previously visited the city for a conference before moving here for work.
在搬到这里工作之前，我之前曾为参加会议而访问过这座城市。
Old use
例子
He previously requests silence before beginning his lecture.
他在开始讲座之前预先要求安静。
03
先前, 之前
used to reintroduce key events from earlier episodes at the start of a new installment
例子
Previously, in Grey's Anatomy: The hospital faced a devastating storm.
此前，在《实习医生格蕾》中：医院遭遇了一场毁灭性的风暴。
