例句與造句

1. We also place emphasis on research of apriori and fp - growth algorithm and compare the performance of two algorithms . secondly , we do research on concepts of structured and nonstructured data , actual state and problems of tree structure mining , and freetreeminer algorithm theory . we also study canonical form and pre - processing technologies of free - tree , concepts and properties of closed and maximal tree , and pruning , growing and mining of tree structure
   其次,研究了結(jié)構(gòu)化與非結(jié)構(gòu)化數(shù)據(jù)的基本概念、樹(shù)結(jié)構(gòu)挖掘的研究現(xiàn)狀、現(xiàn)有樹(shù)結(jié)構(gòu)挖掘技術(shù)存在的問(wèn)題、 freetreeminer算法及其基本思想,重點(diǎn)研究了free樹(shù)的規(guī)范化和預(yù)處理技術(shù)、封閉頻繁子樹(shù)和最大頻繁子樹(shù)的概念和性質(zhì)、樹(shù)結(jié)構(gòu)的剪枝和生長(zhǎng)技術(shù)、樹(shù)結(jié)構(gòu)的挖掘技術(shù)。
2. It's difficult to find maximal tree in a sentence. 用maximal tree造句挺難的