例句與造句

1. The algorithm applies a simple clique finding and weighted coloring to determine lower and upper bounds , and actives exactly one new search tree node at each branching stage which using the information obtained in the weighted coloring to choose a branching vertex , and uses backtracking method to obtain optimum solution
   該算法用團(tuán)的簡(jiǎn)單啟發(fā)式算法提供下界；用加權(quán)著色的啟發(fā)式算法提供上界；在分支階段，每次只產(chǎn)生一個(gè)新的子問題，并利用著色信息來選擇分支頂點(diǎn)；最后利用回溯法來檢驗(yàn)整體最優(yōu)性。
2. It's difficult to find backtracking method in a sentence. 用backtracking method造句挺難的