This is indeed a perplexing problem.

这确实是一个费解的难题。

The cable fire has been a perplexing problem that imperils the safety in production of power plants.

电缆火灾问题一直困挠着发电厂的安全生产。

It is essential to examine every angle in order to fully understand the nature of a perplexing problem.

为了完全了解一个复杂问题的本质，很有必要从各个方面对事件进行调查。

By giving your conscious attention and devotion to the solution of a perplexing problem, your subconscious mind gathers all the necessary information and presents it full-blown to the conscious mind.

通过将你的表意识的注意力全心投入于一个复杂问题的解决方案中，你的潜意识收集了所有的必要信息，并且全面将之呈送给你的表意识。