Javascript jQuery Mobile未呈现下划线JS模板

我试图在我的jQuery移动应用程序中呈现一个下划线JS模板，但是，它似乎无法呈现。这是一个例子

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下划线未定义。如果正确引用下划线库，它将正常工作：谢谢您的回答！

<script type="text/template" id="workers-template">
    <table class="table">
      <thead>
        <tr>
          <th>Worker</th><th>Description</th><th>Store</th><th></th>
        </tr>
      </thead>
      <tbody>
        <% _.each(workers, function(worker) { %>
          <tr>
            <td><%= worker.user %></td>
            <td><%= worker.description %></td>
            <td><%= worker.store %></td>
            <td></td>
          </tr>
        <% }); %>
      </tbody>
    </table>
  </script>

<div id="container"></div>

var workers = [{user:"alicia", description:"fast", store:"Target"}, 
{user:"allen", description:"moderate", store:"n/a"}, 
{user:"bart", description:"fast", store:"Krispy Cremes"}];

var workersTemplate = _.template($('#workers-template').html(), {workers:workers});

$(workersTemplate).appendTo("#container").enhanceWithin();