我们无法获得资金，因此不得不放弃这个项目。

We were unable to get funding and ___therefore had to abandon the project.

我想让我的房间看起来更现代。因此，我决定买一个CD播放器。

I want to make my room look more modern. ___Therefore, I've decided to buy a CD player.

他开会迟到了，因此错过了重要通知。

He was late for the meeting, ___therefore he missed the important announcement.