We found that during laparoscopic SN mapping there is a high risk of false negativity with SNs located in the right paracardial region.

我们发现在对位于贲门右区的前哨淋巴结进行腹腔镜定位时，存在较高的假阴性风险。

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The model of high risk region analysis is built; it divides a city into many same size cells, and every cell is assigned an index to represent hazard degree.

文中建立高危害小区分析模型，设想将城市划分等面积网格，给每个单元网格赋予灾害指数，以确定城市中受灾较为严重的区域，为救灾指挥提供决策信息。

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