Designing a cover specifically for an e-book is rare : most e-book covers are digital images of their print namesakes .
专门为一本电子书设计封面也很少见，大部分电子书的封面都是同名实体书封面的电子版。
Like their biological namesakes , computer viruses replicate by attaching themselves to a host ( a program , or a computer ) and coopting the host 's resources to copy themselves .
Yet these exist mainly to satisfy america 's maddening appetite for stamps and seals , and have little in common with their highly qualified european namesakes .
但是这些公证员的存在仅仅是为了满足美国人对图章的狂热欲望，他们和经过高级认证的欧洲公证员大相径庭。
Viewers can add comments , keywords and identify people in images in the three sets - launch / takeoff , building nasa , and nasa center namesakes , which records historical figures .
Moreover , the characters are brave , noble and , above all , attractive-even if their namesakes bore few of these qualities in real life ( see picture below ) .
