应用何种文化整合模式解决文化冲突，促进文化融合成为文化整合过程中的难点。
Model of cultural integration that settles cultural clash and accelerates cultural harmony becomes an important issue in the cultural integration process.
异类传感器航迹关联是航迹融合中的一个难点，红外传感器与雷达的航迹关联是典型的异类传感器航迹关联。
Track association of heterogeneous sensors plays an important role in track fusion, and the track correlation of infrared sensor and radar is a typical correlation of heterogeneous sensors.
在实际分析的过程中得出两种技术的优缺点，并将两种技术融合起来，各取所长是一个难点。
In the process of practical analysis, it 's difficult to educe the advantages and disadvantages of two techniques and inosculate them.
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