1in practice实际上

In practice women receive much lower wages than their male colleagues.实际上妇女所得的工资比他们的男同事低得多。

2the practice of doing sth做某事的习惯

The Navy has abandoned the practice of serving rum to the men.海军终止了给士兵供应朗姆酒的惯例。

3be out of practice（因久不练习而）荒废，生疏

4be in practice经常练习，熟练

5put sth into practice把某物（主意、计划等）付诸实施

The hard part is putting it all into practice.困难的是将它全部付诸实施。

6practice makes perfect熟能生巧