Because implicit objects are declared automatically, we need only use the reference variableassociated with a given object to begin calling methods on it.
因为隐式对象是自动声明的，所以我们只需要使用与一个给定对象相关的引用变量来调用其方法。
2
This rule also applies to their definition — privileges associated with a global variable are also defined within the system catalog.
这条规则同样适用于全局变量的定义——与全局变量相关的权限也在系统编目中进行了定义。
3
This example defines a DB2_HOSTNAME variable with no associated value, so the value will need to be defined before deployment.