练习实践怎么说用英语

To practice and/or apply what one has learned or been taught, you can say "to put into practice" or "to put into action." For example:
"I have been studying English for a long time, and now I want to put my skills into practice by speaking with native speakers."
"I learned a lot about programming in my computer science class, but it's important to put that knowledge into action by building projects and solving problems."