in practiceused when saying what really happens rather than what should happen or what people think happens 实际上；在实践中 In practice women receive much lower wages than their male colleagues. 实际上女性所得的工资比她们的男同事低得多。
The journey should only take about 30 minutes, but in practice it usually takes more like an hour. 这段路程应该只需约30分钟，不过实际上常常要1小时左右。
in practice• In practice, the city's transportation system is very inefficient.• Teenagers are not allowed to drink in bars, but in practice they often do.• The law seemed like a good idea in theory, but in practice it has proved far too expensive.• Economic predictions are highly theoretical. It's what they mean in practice that is important.
→ in practice at practice(1)