If these are key to the problem in question you will not be able to use XSLT to cleanse the files.

如果这些内容对解决问题很重要，就不能使用XSLT清理文件。

youdao

To strengthen moral construction and associate it with system arrangement is the key to the problem.

加强道德建设，把道德建设与制度建设相结合，利用制度的硬性约束已成为解决问题的关键。

youdao

The key to the problem is to assure the stability of water ring.

保证水环的稳定性是水环输送的关键。

youdao

Now, as obvious a statement as that is in this algorithm, it turns out that is the key to this whole problem being solved correctly without my algorithm looping infinitely.

这是此算法中很明显的一句话，也是正确解决,整个问题的关键,否则此算法就会陷入死循环。

哈佛公开课 - 计算机科学课程节选

Russia lost no time in claiming that Chechnya was the key to the problem.

BBC: The Dagestan connection

In short, if subject matter expertise were the key to solving the problem, the organizations we work with would have already solved it.

FORBES: Insight Labs on How to Solve the World's Toughest Challenges

Often the goal is to find the key indicator of a problem or to track the performance of a system.

FORBES: Splunk's Godfrey Sullivan on Overcoming Barriers to Operational Intelligence