确保志愿者在整个工作当中对所完成的工作做记录。
我们可以把IObserver附加到鼠标事件并对这些事件异步记录到一个集合当中。
One could attach an IObserver to mouse events and record them asynchronously into a collection.
Google分析将日志文件记录中的每个片段放入被称为字段的数据元素当中。
Google Analytics turns each piece of data in the logfile record into a data element called a field. Later, the fields will be transformed into dimensions.
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