| 1. | Users can add and delete layers and filters individually . although there are plenty of different spam - filtering technologies , many problems are still not well resolved , which affects the effectiveness and reliability of filtering system
虽然现在已经存在多种不同的垃圾邮件过滤技术,但是还有许多垃圾邮件的相关问题没有找到好的解决方法,这影响了过滤系统的有效性和可靠性。 |
