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.
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.
但在实践中,这样的成本比较却是甚少为之。
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。
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