我打开了这个网页。
假设你在浏览互联网时偶然打开了一个会议召集通知，网页上有召开会议的时间和地点，并且还有很多超链接地址，分别链接到本次会议召集人及其它参与人员的个人主页。
It has the time and place and links to other documents including the home pages of other people involved in organizing and attending the meeting. You decide to attend, and click the "register" button.
如果你也打开了其他的网页，你就会看到所有加载网页的列表：拖动滚动条直到找到YouTube网页，单击箭头以查看当前加载项的详细信息。
If you're also loading other sites, you'll see a list of them: scroll until you find the YouTube page and click on the arrow to show details about what is being loaded.
应用推荐