警方已对此事展开了一项（持续进行的）调查。

The police have launched an ___ongoing investigation into the matter.

尽管进行了长时间的讨论，和平谈判仍在（继续）。

Despite lengthy discussions, the peace talks are still ___ongoing.

我们致力于确保该项目的（持续）成功。

We are committed to ensuring the ___ongoing success of the programme.