practice of

例句：

1. 1.The teacher emphasized the importance of practice in learning a new language.
   老师强调了学习一门新语言时实践的重要性。
2. 2.The project required practical experience to be successful.
   这个项目需要实践经验才能成功。
3. 3. The scientist applied his theory to real-world problems.
   这位科学家将他的理论应用到了实际问题中。