It consists of a number of elements that track the relationship of the entry to other entries in the file system as well as physical data (such as the file name).
它由许多元素组成，这些元素在文件系统和物理数据中跟踪条目之间的关系(比如文件名)。
2
Information technology already means that physical privacy has become a scarce commodity. Websites track your interests and purchases.
信息技术已经使身体隐私变成了一件稀有的物品，网络跟踪你的兴趣和购买的物品。
3
With major changes to the nation's health-care system looming, it may be more important than ever for people to keep track of their own physical health.