values子句还为用户指定的oid列的值包括了一个casting函数，因为该值必须强制转换成目标表的REFERENCE类型。

The VALUES clause also includes a casting function for the user-specified value of the OID column because the value must be cast into the REFERENCE type of the target table.

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研究事件参与者之间的因果关系主要是分析子句主语、宾语和介词强制成分之间的因果关系。

Studying the causal relationship between event participants is mainly analyzing the causal relationship between clause subjects, objects and preposition coercive compositions.

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