tree graph的用法和樣例：
例句
- Especially, the adjacent tree graph and line graph are both included as special cases of our generalization.
特別，鄰接樹圖和線圖是我們推廣的特殊情況。 - Introduced in this paper is the forest graph of a connected graph which is a generalization of the tree graph.
摘要本文中引進了連通圖的森林圖，它是樹圖的推廣。 - The tree grows luxuriantly flourishing, the fountain trickle starts to flow.
樹木啁欣欣向榮，泉水啊涓涓始流。
