例如要在文章里講語法高亮的寫法，可以像下面寫

```` //這里寫4個反引號
``` javascript
var aaa = function(){
  let foo = 'foo'
  let bar = 'bar'
  console.log(foo + bar) // print foobar
  console.log(`google is a searche engine ${foo}`)
}
```
```` //這里用4個反引號關(guān)閉

效果

blablabla... ... 在markdown中，你可以這樣寫，實現(xiàn)代碼塊效果，還支持語法高亮

``` javascript
var aaa = function(){
 let foo = 'foo'
 let bar = 'bar'
 console.log(foo + bar) // print foobar
 console.log(`google is a searche engine ${foo}`)
}
```

最終代碼塊的渲染效果如下

var aaa = function(){
 let foo = 'foo'
 let bar = 'bar'
 console.log(foo + bar) // print foobar
 console.log(`google is a searche engine ${foo}`)
}

blablabla... ...