第一个句子是“with的复合结构”引导了后置定语修饰“campus”。 第二个句子是“around which”引导的“定语从句”修饰“campus”。 二者句意一致，只是句式不同！^_^

They do, but the feelings of the sentences are different. The second sentence puts more emphasis on the big trees being a feature of the campus, whereas the first sentence sounds more like the big trees are simply a fact about the campus. However, more importantly, the first sentence sounds more like regular spoken English, while the second sentence sounds more poetic, like something you'd find written in literature.

The two sentences have the same meaning. - The campus with big trees planted around it - This phrasing emphasizes the location of the trees in relation to the campus (planted around it). - The campus around which big trees are planted - This phrasing flips the perspective slightly, focusing on the trees encircling the campus. Both sentences convey the same image: a beautiful campus with large trees growing around its perimeter. The difference is a subtle shift in viewpoint.