anchor.diff:    Use the same `lite-server` employed elsewhere in the documentation:
   
     你需要一个Web服务器来作为应用的宿主。
  -  像与文档中其它部分一样，用*Lite Server*吧：
  +  像与文档中其它部分一样，用`lite-server`吧：
  +  
   code-example(language="none" class="code-shell").
     npm run lite
  +
   :marked
     The server starts, launches a browser, and the app should appear.
  +  
     启动了服务器、打开浏览器，应用就出现了。
  +  
   a#source-code
   .l-main-section
   :marked
  
positive.code:   ***index.html***
  
    The JIT and AOT apps require their own `index.html` files because they setup and launch so differently. 
    JIT和AOT应用的设置和加载非常不一样，因此它们需要各自的`index.html`文件。
    Here they are for comparison:
  
    下面是它们的比较：
  
negative.code:   to store the compiled output files in a new `aot` folder.
  
    `ngc`区真正新增的内容是底部的`angularCompilerOptions`。
    它的`genDir`属性告诉编译器把编译结果保存在新的`aot`目录下。
  
    The `"skipMetadataEmit" : true` property prevents the compiler from generating metadata files with the compiled application.
    Metadata files are not necessary when targeting TypeScript files, so there is no reason to include them.
  