DGC does an optimization and technology mapping for an abstract description of boolean functions and state machines.

DGC为布尔函数和状态机的抽象描述进行优化和技术映射。

The prognosis of PGC is worse than of DGC, and the main causes may be later presentation of symptoms and more advanced TNM stages because of special tumor location in PGC group.

胃近端癌预后比远端胃癌差，其重要原因可能与肿瘤位置特殊，出现症状较晚及就诊时肿瘤分期较晚有关。