It's the best news I've heard in a long time.

这是我很长时间以来听到的最好消息。

《柯林斯英汉双解大词典》

I hadn't felt that great in a long time.

许久以来，我都没有过那么棒的感觉了。

youdao

For the first time in a long time, I feel good.

这么长时间以来第一次，我感觉很好。

youdao

Later,I got a telephone call from a friend whom I had not seen in a long time.

VOA: special.2009.05.03

Maybe you have a boyfriend or girlfriend that you haven't seen in a long time.

也许你已经好久不见你的男朋友或者女朋友了。

I can't 课堂 - SpeakingMax英语口语达人

I haven't been to the theater in a long time.

我好久没去剧院看电影了。

I'm going实战 - SpeakingMax英语口语达人

Or at least easier and more affordable than it has been in a long time.

BBC: Escape from New York

Futures traders now hold the largest short position they have had in a long time.

FORBES: METALS OUTLOOK: Consolidation Possible For Gold Next Week

Her small gesture of compassion was the first I had experienced in a long time.

NPR: The Connection Between Strangers