来龙去脉
phrase C2- (lit.) the rise and fall of the terrain (idiom)
- (fig.) the whole sequence of events; causes and effects
Its characters
From the library
他记下的不只是风景，还有山的高低走向、河流的来龙去脉、岩石的颜色和质地，甚至每天走了多少里路。
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