如果服务发生了微小改变，客户机的代码不需要修改太多就能与之相匹配，如果您真的很聪明的话，客户机代码也可以做成动态的，这样就根本不用修改了。
If the service changes a bit it doesn't take much to change the client code to match, and if you're really clever, your client code can be so dynamic that it doesn't have to change at all.
在网格中要实现更加准确有效的服务发现、查询及其动态分配和替换，需要在语法匹配的基础上进一步实现语义匹配。
For better efficiency and accuracy, it needs semantic match between grid services to implement the service discovery, the service query, and the dynamic allocation and replacement of service.
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