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说明: curve这里本意是趋势图,这里用引申义,表示 A trend derived from or as if from such a graph(美国传统词典)即趋势、潮流之意,整个短语当是领先潮流之意,不过刚才clearwater建议的领先一步已经是正确的解释了,我这里再稍加发挥,算是班门弄斧了:)