辛迪说这种翻页跟踪似乎是无害的，但如果这家公司长期保留这种数据，那么这种信息可能会被法院传唤以验证一个人的证词，或在诉讼中用作证据。
Cohn says this kind of page-view tracking may seem innocuous, but if the company keeps the data long-term, the information could be subpoenaed to check someone's alibi, or as evidence in a lawsuit.
不同于一次性购买或签订长期服务合同，传感器可以跟踪实际使用情况，允许顾客根据自己的消费内容甚至得到的价值进行支付。
Rather than buy a product outright, or sign a long-term service contract, sensors can track actual usage, enabling customers to pay only for what they consume or even the value they receive.
这项由珀斯市西澳大利亚大学心理学家安德鲁·怀特豪斯负责的新研究，是首个对晚说话宝宝进行长期跟踪调查的研究。
The new study, led by psychologist Andrew Whitehouse at the University of Western Australia in Perth, is the first to track late talkers over the long haul.
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