基本解释裂点，节点词组短语短语gully and knick point 冲沟裂点knick point更多词组英英字典柯林斯英英字典 a break in the slope of a river profile caused by renewed erosion by a rejuvenated river knick point剑桥字典knick point柯林斯字典专业释义地球科学裂点泥克点尼克点节点环境科学技术节点