将以下语句进行翻译,同时分析句子的语法和句式。 The startup period can require a few days or a few moths, depending on the newness of the technology, the complexity of the process, and quality of the engineering that has gone into the design. Problems are frequently encountered that require equipment modifications. This is time consuming and expensive: just the lost production from a plant can amount to thousands of dollars per day. Indeed, there have been some plants that have never operated, because of unexpected problems with control, corrosion, or impurities, or because of economic problem.