This is a major improvement over scattering calls to update statistics and to track context throughout my example application.
比起在整个示例应用程序中用分散的调用更新统计值和跟踪上下文,这是一个重大的改进。
2
Major polluters must keep track of their emissions, and these data are collected and then published by the EPA.
主要的污染物必须追踪他们的排放踪迹。这些数据被收集并发表在EPA上。
3
Three dozen NOAA vessels are currently working to track the oil spill and major research cruises are being put together to study the effects of the BP oil spill in the Gulf.