这种病尚没有确切的治愈方法，但可以医治。

There is no known cure but the illness can be treated.

《牛津词典》

虽然警察认为最有可能是他，但因为没有确切的证据，他们不能逮捕他。

Although the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.

youdao

没有人确切知道这段友谊是如何开始的。

No one is quite sure how the friendship first began.

youdao

Well, maybe the answer is there's no particular time at all when I killed him But for all that, it's true that I killed him ? What makes it true that I killed him?

也许答案是,我什么时候杀死他根本没有确切的时间,尽管如此，我杀死他是真的,为什么我杀死他是真的？

耶鲁公开课 - 死亡课程节选

They just say, "It's just because!" It's hard to know exactly why it's "a".

他们只会说“没有为什么！”为什么用“a”很难确切搞清楚。

韩国人经常犯的失误 - SpeakingMax英语口语达人

If stock price option -if stock options tend to be issued as announced by the company later, just before stock prices go up, there's no way that that can be right because nobody can know exactly when the stock price is going to go up.

如果股票期权价格...,如果就像公司事后宣称的一样,公司恰好是在股价上涨之前,发行的股票期权,这是不可能做到的,因为没有人可以确切知道,股票价格何时会上涨

耶鲁公开课 - 金融市场课程节选