图论 algebraic graph theory; graphentheorie graph theory; graphtheory; the theory of graphs
树 Ⅰ名词1.(木本植物的通称) tree 柳树 willow; 苹果树 apple tree; 植树 plant trees2.(姓氏) a surname 树元 shu yuanⅡ动词1.(种植; 栽培) plant; cultivate 十年树木, 百年树人。 it takes ten years to grow trees, but a hundred years to rear people.2.(树立; 建立) set up; establish; uphold 建树 achievement; 树雄心 have lofty ambitions; aim high; 树正气 uphold [foster] healthy tendencies