在整个IEPD开发过程中对模型进行反复修改是很常见的。
It is common to make iterative changes to the model throughout the IEPD development process.
工程结构的设计过程是一个反复修改的迭代过程。
Design process of an engineering structure is an iterative modification process.
起头写文章，要反复修改，知道最佳的文章出手。
Write your article. Then rewrite it. Make it the best article you can.
写作是要反复修改的，要把它作为一个过程而不是结果。
It's revision writing. You write as a process, not as a product.
好的文章提要也是研究工作的好计划，在研究的过程中，应该反复修改这些计划或提要。
A good outline for the paper is also a good plan for the research program.
好的文章提要也是研究工作的好计划，在研究的过程中，应该反复修改这些计划或提要。
A good outline for the paper is also a good plan for the research program.
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