But users need a "tracker" link to find what they're looking for - like the index card in a library catalogue.
但是用户需要tracker服务器来连接他们所要寻找的文件，就像图书馆目录中的索引卡。
2
This is evident in the recent wage component of Employment Cost Index data, average hourly earnings and the Atlanta Fed's wage tracker for job switchers.
The performance evaluation of TV tracker by the scene simulation is studied. An evaluation model and an index system for quantitative evaluation are established.