题名	解释
症结	1.a crux; a crucial reason; a difficult point (of a problem); a bottleneck; a basic problem ~crux
症结所在	1.the crux of the problem; where the trouble lies; where the shoe pinches
问题的症结	where the shoe pinches
发现症结所在	got to the heart of ~gotten to the heart of
探求问题的症结所在	locate the real problem

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