Some of the most important duties involve maintenance, both preventative tasks carried out before things go wrong, and the corrective approach once something's actually broken.

最重要的职责之一涉及维护工作，这既包括出现问题之前进行的预防性工作，也包括发生故障采取的纠法。

Like nuclear reactors, precautionary systems prevent our factories, wellheads, and drilling rigs from bursting into flames; but those systems may fail, sparking industrial fires, releasing pillars of black smoke, and further polluting the atmosphere with greenhouse gases.

像核反应堆一样， 预防系统可以防止我们的工厂、井口和钻井平台起火；但这些系统可能会发生故障， 引发工业火灾， 释放黑烟柱， 并进一步用温室气体污染大气。