nodejs express ejs 引入文件失败


<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <body>

    <% include ("./www/in.txt")%>
    <% include ../a.txt %>

  </body>
</html>

萌新刚学，碰到ejs引入外部 CSS html 都是undefined 是不是系统问题，

<% 后面缺了个-


<%- include ("./www/in.txt")%>