编译器就是将“高级语言”翻译为“机器语言（低级语言）”的程序。一个现代编译器的主要工作流程：源代码 (source code) → 预处理器 (preprocessor) → 编译器 (compiler) → 目标代码 (object code) → 链接器 (Linker) → 可执行程序 (executables)-The compiler is to " high-level language," translated as " machine language

Node.js NPM package for rendering beautiful emails with your template engine and CSS pre-processor of choice coupled with email-friendly inline CSS using juice.