Essentially, when you use classes, you have a way to create custom tags that you can add to page elements, where you like and when you like.

从本质上说，如果使用类，就可以创建定制的标记，可以在页面中的任何地方添加这些标记。

youdao

Follow the instructions on the page for your phone to add the bookmark as a shortcut on your app launcher.

按照页面上的指示在你手机上添加书签作为你的应用启动栏中的快捷方式。

youdao

The 32-page catalogue is chock-full of things that add fun to festive occasions.

这个32页的产品目录充满了令节日氛围愈发浓重的商品。

《柯林斯英汉双解大词典》

All you need is to add a Books to Read page to any relevant intranet, sign up to be an Amazon Associate and add a message: "To buy any of these books, click here" -- where "here" is the link to Amazon.com.

CNN: When digital culture meets print culture

You can add applications to your page, including your own custom content video, rich text, graphics, opt-in box and more.

FORBES: Facebook 101 for Busy Business Owners

Gamification is being used by a number of companies such as Badgeville, Bunchball, 500Friends and Rypple to add page views, monetization and loyalty or encourage other actions inside of a company.

FORBES: How Keas Gets Couch Potatoes To Lose Weight