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 .

就像他们生物学中的同名物一样，计算机病毒复制时就是将自己俯身于宿主上（一个程序或是计算机），然后利用宿主的资源来复制自己。

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 .

图片浏览者能够添加评论，关键词，在三个图集“发射”、“nasa建设”与“用历史人物命名的nasa宇航中心”上圈人。

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 ) .

此外，角色是勇敢，高贵和最重要的是有吸引力，即使他们的使用者在现实生活中的很少有这些素质数（见下图）。