For example, the top 50 websites in the us on average installed 64 pieces of tracking technology onto the computers of visitors, usually with no warning.
例如，全美最大的50家网站平均在访问者的电脑上安装了64种追踪技术，而且通常都没有任何警告。
It is now easy, for example, to experiment with changes in the layout of a website, showing different configurations to different visitors and tracking results in real time.
例如，现在很容易实验网站布局改变的效果，向不同访客显示不同的配置，并实时跟踪结果。
The study found that the nation's 50 top websites on average installed 64 pieces of tracking technology onto the computers of visitors, usually with no warning.
在大多没有警告的情形下，全国50大网站在访问者电脑上平均安装了64项追踪技术。
The study found that the US 50 top websites on average installed 64 pieces of tracking technology onto the computers of visitors. A dozen sites each installed more than a hundred.
调查称，美国50大人气网站平均装有64个跟踪访客软件，其中约12个网站装有逾百个跟踪器。
Contractor access to a site is controlled using a visitors log or other tracking system.
使用访客日志或其他跟踪系统来管理承包商在现场的进出。
The online measurement service will scrap rankings based on the longtime industry yardstick of page views and begin tracking how long visitors spend at the sites.
线上测量服务将扔弃追踪访客在现场花费多久的以页检视的长时间工业码尺为基础，而且开始的排名。
The online measurement service will scrap rankings based on the longtime industry yardstick of page views and begin tracking how long visitors spend at the sites.
线上测量服务将扔弃追踪访客在现场花费多久的以页检视的长时间工业码尺为基础，而且开始的排名。
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