This is a virus that has hitherto not been discovered.

这是一种迄今为止都没有被发现的病毒。

This is a catastrophe that has hitherto never happened before.

这是一场史无前例的大灾难。

Hitherto scientists have not developed an effective antidote.

到目前为止，科学家都还没研制出有效解药。

Hitherto, there is no method to treat cancer.

迄今为止 还没有治疗癌症的方法

We are going to focus on hitherto underdeveloped sections of our economy.

我们将把重点放在我国经济中迄今尚未开发的部分。

He was a famous navigator who mapped many hitherto unexplored islands.

他是一位著名的航海家，绘制了许多在当时尚未开发的岛屿。

Despite being an expert, she has been hitherto silent on the contentious issue.

尽管她是一位专家，但她对这个有争议的问题至今保持沉默。

In order to "prime the pump" of the economy, governments were encouraged to take on deficits, something hitherto unimaginable.

为了“刺激”经济，鼓励政府承担赤字，这是迄今为止也难以想象的事情。

The ruling party is likely to be opened up to let in people hitherto excluded.

执政党可能会放开政策，吸纳迄今被排斥在外的人士。

Hitherto he had thought it was some fiend fighting him, but darker suspicions assailed him now.

到目前为止，他一直以为是魔鬼在跟他搏斗，但现在更阴暗的怀疑向他袭来。

In himself, too, he knew that it was vibrating at last, that chord hitherto dormant and unsuspected.

在他自己心里，他也知道那根弦终于在颤动了，那根弦一直蛰伏着，不曾被察觉。

The work fills (in) a gap which has hitherto existed in our archaeological literature.

这部著作填补了我国考古学文献中的一个空白。

Hitherto we haven't been successful.

不过目前为止我们还没有成功做到这一点。