这在理论上肯定有风险，但在实践中却很少出问题。

This is certainly a theoretical risk but in practice there is seldom a problem.

《柯林斯英汉双解大词典》

其他替代方案在理论上很有吸引力，但在实践中要么不切实际，要么只能提供微不足道的改进。

The other alternatives are attractive in theory but in practice are either impractical or offer only marginal improvements.

youdao

但在实践中，这样的成本比较却是甚少为之。

Such cost comparisons are seldom made in practice.

youdao

Well, one of the lessons of this course is we have a wonderful theory, but we don't manage it well, mostly.

我们在这门课里可以学到的一点是,我们拥有很好的理论，但在实践中却总是不能应用得当。

耶鲁公开课 - 金融市场课程节选