英语词汇“four-clour problem”的读音、翻译、释义、用法及例句-范文网

词汇	four-clour problem
释义	four-clour problem【数学】四色难题〔指以四种颜色绘制地图、而不得让同一种颜色的地区相邻的数学难题〕。problem: n. 1.问题，课题；疑难问题；令人困惑的情况。 2.【 ...
随便看	norther northern northern cross northern crown northern hemisphere northern ireland northerner northernmost northing northland northman northumb northumbrian northward northwardly northwards northwest northwest mounted police northwest passage northwest territories norton norward norwards norway norway pine

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