Add references to the required elements.

添加对所需元素的引用。

youdao

Therefore, you do not need to add references for that MDB.

因此，您不需要为那个 MDB 增加引用。

youdao

To add a reference to a URL, click Add to add references as shown above.

要添加对某一 URL 的引用，那么点击 Add添加如我们上文所讲述的引用。

youdao

And you can't print articles from the app, though Britannica says it plans to add printing and the ability to post references to articles to social networks.

WSJ: Encyclopaedia Britannica Now Fits Into an App