有一种更简单的芯片叫做无线射频识别(RFID)标签，它在被激活之后可以在小范围内发送很短的一段数据，现在，其造价只要4美分一片。
A far simpler kind of chip called a radio-frequency identification (RFID) tag, which sends a tiny quantity of data over a short range when activated, can already be manufactured for 4 cents apiece.
Facebook也会从它收集的用户数据中创造价值吗？
Would Facebook like to build value on top of the data it collects from your browsing around the web?
在项目开发过程中的某一特定阶段的成本估算就是造价工程师在现有数据基础上对未来成本的预测。
A cost estimate at a given stage of project development represents a prediction provided by the cost engineer or estimator on the basis of available data.
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