stepwise polymerization

例句：

1. 1. The company is implementing astepwise approach to its new product development.
   该公司正在逐步实施其新产品开发的计划。
2. 2.The teacher guided the students through a stepwise explanation of the math problem.
   老师一步一步地解释了数学问题。
3. 3. The project was designedto be completed in steps, ensuring smoothprogress.
   该项目被设计成分步完成，以确保顺利进行。