As a middle layer of three-layer structure, middleware is important.
中间件作为三层体系结构的中间层，作用至关重要。
Finally, the application of three-layer structure method in geoscience is discussed.
最后，对该三层结构方法在地学中的应用做出总结。
Finally, the application of three-layer structure method in geoscience is discussed.
最后，对该三层结构方法在地学中的应用做出总结。
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