There is a time-lag between theoretical research and practical applications.
理论研究和实际应用之间存在时滞。
In need of theoretical research and practical application, the study of unsteady aerodynamics model has become particularly important.
由于理论研究和实际应用的需要，非定常空气动力学模型的研究变得尤为重要。
It is my sincere hope that the studies of these legal questions of very practical meaning will benefit hull insurance in theoretical research and practical operation.
希望通过对这些非常具有实践意义的法律问题的深入研究，能够给船舶保险的理论研究和实践操作带来益处。
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