previously

柯林斯词典

1. ADV Previously means at some time before the period that you are talking about. 先前地
Guyana's railways were previously owned by private companies. 圭亚那的铁路先前为私营公司所拥有。
The contract was awarded to a previously unknown company. 该合同给了一家先前不知名的公司。
2. ADV You can use previously to say how much earlier one event was than another event. (某时长) 之前[n ADV]
He had first entered the House 12 years previously. 他12年前首次进入了众议院。

This information was previously unavailable to the public .
Has anything similar happened previously, or is this the first time he has behaved like this?
Factions previously at war with one another are now united against the common enemy .
The album includes four previously unreleased tracks .
About 23% of men and women aged 25 to 34 told researchers they had previously cohabited with a partner without it leading to marriage .