下面的例子展示了如何在上下端有标签的帧中创建画布。
The following example shows how to create a canvas in a frame with labels at the top and bottom.
help选项将打印出支持的标签条目列表(ID 3中的帧)。
The -help option will print out the list of supported tag entries (frames in ID3).
该算法思想是，统计每一帧中发生碰撞的时隙数，根据碰撞时隙数、帧长度与标签数的关系估计出标签数，然后根据标签数动态调整帧长度的大小。
The algorithm counts the number of collision slots in a frame, then estimates the number of tags according to collision slots and frame length, dynamically adjusts the frame length according to tags.
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