VMM is a program on a host system that lets one computer support multiple, identical execution environments.

VMM是主机系统上的一个程序，它让一台计算机支持多个相同的执行环境。

youdao

When the Run program from Listing 1 begins execution, it's already been loaded by the default System classloader for the JVM (the one that works off the classpath you define).

当清单1中的Run程序开始执行时，它已经被JVM默认的System classloader(您定义的classpath所指定的那一个)加载了。

youdao

I leave the task of scheduling the execution of the program to the reader, as system-dependent methods for doing so are often superior to simple programmatic ones.

我把程序执行调度任务留给读者，因为执行这些任务的与系统相关的方法通常比简单的编程方法高级。

youdao