Because there is no error handling logic, you must rely on database constraints to ensure semantic integrity of the data.

因为没有错误处理逻辑，必须依靠数据库的限制，以确保数据的语义完整性。

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Error handling and semantic analysis are topics in upper level, and the studies and partial implementation of them are also included in this paper.

错误处理和语义分析是较高的层次，本文对此也做了研究和部分实现。

youdao

Error handling and semantic analysis are topics in upper level, and the studies and partial implementation of them are also included in this paper.

错误处理和语义分析是较高的层次，本文对此也做了研究和部分实现。

youdao