外壳型病毒将它们自己包裹在主程序的四周，对源程序不作修改。 外壳型病毒容易编写，这也正是约有一半病毒程序是这种类型的原因。
Shell viruses wrap themselves around a host program and don't modify the original program．Shell programs are easy to write，which is why about half of viruses are of this type．
病毒是只有少数基因和蛋白外壳的紧凑型生物实体，对生物工程有很大作用。
Compact biological entities with little more than a handful of genes and a protein coat, viruses lend themselves to engineering.
有四种类型的病毒程序：外壳型、入侵型、操作系统型和源码型。
There are four main types of viruses: shell, intrusive, operating system and source ode.
有四种类型的病毒程序：外壳型、入侵型、操作系统型和源码型。
There are four main types of viruses: shell, intrusive, operating system and source ode．
病毒对计算机的破坏程度取决于它是操作系统型、外壳型还是入侵型或源码型。
The extent of damage to computer virus depends on it is operating system type, shell type or intrusive or source type.
有四种类型的病毒程序：外壳型、入侵型、搡作系统型和源码型。
There are four main types of viruses: shell, intrusive, operating system and source code.
外壳型和入侵型病毒通常攻击可执行文件，即带有或扩展名的文件。当然数据文件也有受攻击的危险。
Shell and intrusive viruses most commonly attack executable program flies-those with a. com or. exe extension, although data flies are also at some risk.
外壳型和入侵型病毒通常攻击可执行文件，即带有或扩展名的文件。当然数据文件也有受攻击的危险。
Shell and intrusive viruses most commonly attack executable program flies-those with a. com or. exe extension, although data flies are also at some risk.
应用推荐