[简答题]Translate the following sentence into Chinese. To work the machines, energy must be supplied from sources such as coal, water power, electricity and oil.
正确答案：
机器的运行还需要能源，这些能源是由煤、水力、电力和石油提供的。
题目解析
考点：machine机器；be supplied被提供；electricity电力。
句子结构：To work the machines作目的状语，句子主干为energy must be supplied from sources。
