This lets us filter the data frame as a whole, selecting rows of possible interest.
这就让我们可以将数据帧作为一个整体进行过滤，挑选出可能引起注意的连续点。
2
Once the colorspace filter is on the other side of the tee, it's still getting run every frame, but it's now possible to change this.
对于tee元素，colorspace过滤器将一直运行所有帧，但是现在这一情况可能被改变。
3
For this example, the filter order must have a value higher than 1000 to be called after the DefaultFilter because the window frame can only be created after the HTML document conversion is complete.