大部分证据都被毁了。因此，不可能证明这种药物是有害的。

Most of the evidence is destroyed. Thus, it's impossible to prove that the drug is harmful.

youdao

忒修斯不可能证明他的能力倘若他没有发现雅典人还处于各自为政的分散状态的话。

Theseus could not have demonstrated his ability if he had not found the Athenians dispersed.

youdao

伊朗的大选被事先安排好是不可能证明的，但伊朗大众投票的官方数字显示似乎无法让人信服。

That the Iranian elections were fixed is impossible to prove, but that Iranians voted as the official figures indicate seems impossible to believe.

youdao

It was impossible-- doctors and scientists showed, runners, athletes, the top-ones in the world proved that the doctors were right.

那是不可能的，医生和科学家证明了，跑手，运动员，世上顶尖选手证明了医生们是对的。

哈佛公开课 - 幸福课课程节选

But even if we didn't think we could show that the soul would continue to exist at least it could, it would make perfect sense to think about it continuing to exist.

但即使我们不觉得,我们能证明灵魂继续存在,至少有这个可能，认为灵魂不死,对很多人来说很有意义。

耶鲁公开课 - 死亡课程节选