经过 and 纠缠 both start with p and with s in the end, but 大有不同.
Still there is a trick in it :)
Pass may relate to result--guo3, guo3 and chan2 become an interesting pair...
纠缠或明禅,
裹足难成果.
裹足无大过
裹足难经过
裹足难成果
收放要严格
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