The boolean condition that caused the assertion to fail is also displayed 导致断言失败的布尔条件也会被显示。
This class contains a set of static methods that evaluate a boolean condition 该类包含计算布尔值条件的一组静态方法。
If set arithabort is set to off and an abort error occurs during the evaluation of the boolean condition of an if statement , the false branch will be executed 如果set arithabort设置为off ,并且对if语句的boolean条件求值过程中发生中止错误,则将执行false分支。