The following code example shows how an EJB application might access a database resource by using pooled connection objects (based on JDBC 2.0).
以下代码示例显示了EJB应用如何利用合用的连接对象来访问数据库资源(基于JDBC 2.0)。
The existing occlusion models such as LOS and ROC are all based on the RCC (Region Connection Calculus) theory, which is not suitable for handling multi-dimensional objects.
LOS和ROC等现有的遮蔽关系模型都是基于RCC（区域连接演算）的，因而不能支持混合维空间对象。
The existing occlusion models such as LOS and ROC are all based on the RCC (Region Connection Calculus) theory, which is not suitable for handling multi-dimensional objects.
LOS和ROC等现有的遮蔽关系模型都是基于RCC（区域连接演算）的，因而不能支持混合维空间对象。
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