“free tree”的概念、定义、翻译、参考文献-科学参考

单词	free tree
释义	free tree [`frē ´trē] ^MATHEMATICS A tree graph in which there is no node which is distinguished as the root.
随便看	double-word addressing double-work doubling dose doubling the angle on the bow doubling time doubly linked ring doubly plunging fold doubly ruled surface doubly stochastic matrix doughnut Douglas-fir Douglas-fir oil douglasite Dounce homogenizer do-until structure douse douser Dovap Dove dove Dove prism dovetailing dovetail joint dovetail molding dovetail saw

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。