It occurs to me that example is always more efficacious than precept.我想到身教重于言教.You won't find this moral precept in the scriptures.你在《圣经》中找不到这种道德规范.Example is better than precept.言教不如身教....
Therefore , email is confronted with such unsafe factor as leaking dropping, tempering, disavowing, etc.电子邮件与其他网上传输的信息一样,面临着信息泄漏 、 丢失 、 篡改与抵赖等不安全因素....