The proof was fished up from old papers.

这个证据是从旧文件中搜寻到的。

youdao

The proof was fished up from some old papers.

校样在旧文件中被找到了。

youdao

Giving a new definition for the rate of entropy production is a proof method adopted in some papers published recent years to guarantee that the rate is non-negative.

在过去发表的非平衡热力学文献中所采用的一种方法就是对熵产生的速率重新加以定义，其目的在于确保熵产生的速率为非负值。

youdao

Given the ease with which proof-of-origin papers can be faked, it was hard to tell where any of it really came from.

ECONOMIST: Genetic testing of wood can curb illegal logging