电缆火灾问题一直困挠着发电厂的安全生产。
The cable fire has been a perplexing problem that imperils the safety in production of power plants.
在皮鞋成型过程中，消除帮面褶皱一直是困挠皮鞋成型质量的最大难题，也是皮鞋成型过程中必须要解决的问题。
In their shaping process, the removal of the vamp fold remains the biggest problem that influences the shaping quality of leather shoes, and thus should be resolved.
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