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.
瑞安说：眨眼理论上是好的，但在实践中很难。
Ryan says: the wink is good in theory but difficult in practice.
在日本，理论上陪审团审判一直是存在的，但是在实践中几乎未采用。
In Japan, jury trials were once available in theory but little used in practice.
不仅在理论上，而且在实践中，撒切尔主义正在被摈弃之中。
In practice as well as in theory, Thatcherism is in the process of being abandoned.
从理论上还是在实践中，它显示了优势。
从理论上还是在实践中，它显示了优势。
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