而且是非易失的, 因此断电时它仍能保存内容.And nonvolatile, so it retains its contents when the power is off.ROM通常是用于永久的 、 非易失的应用程序存储.ROM is usually for the permanent, non - volatile storage of an applications program....

“易失的”的英语可以翻译为：[计] volatile，losable ...