在一些歷史古跡，常有一些曾經見證過重要歷史事件和著名人物的參天古樹。它們歷經滄桑，觸摸著它們就仿佛感受著歷史的厚重。

Witness tree refers to an extremely old tree, particularly one that was present at one or more important historical events.
“見證樹”指的是歷經滄桑的古樹，特別是“見證”過一個或多個重要歷史事件的古樹。

Many tourists come to the Laurel Hill Cemetery, and they loved the tree because it was one of those that touched history; it was alive when famous figures from the past were alive.
很多游客前來勞瑞爾山墓園，他們愛這里的一棵見證樹，因為它曾經感觸歷史。一些歷史著名人物活著的時候，它生活在那里。

Many battlefields, such as Gettysburg, have ‘witness trees,’ which survived the fighting and are honored.
很多戰場，比如美國的葛底斯堡，都有“見證樹”，它們在戰爭中存活下來，并受人尊敬。

（中國日報網英語點津 yaning）