Each dot represents a train on the national network; visitors can filter the map to see all the trains bound for a particular station.
每个点代表国家铁路线上的一列火车；用户们可以通过筛选来查看地图上某一个站点的所有火车。
2
In this paper a circuit of filter and shaping is provided for obtaining a better time service signal of the China Central Radio Station from a noised record.
本文给出了一个滤波整形电路，以便从干扰记录中，尽可能干净地提取出中央台授时信号。
3
The CSS filter Lens can append to the visual sieved Lens and the convertible effect the normal HTML element, and it can also act on many Webs, even the whole Web station.