此外，Turin说，远古人类，在某种对许多现代西方人都难以理解的方式上，可能感到他们与景观紧密相连。
Also, Turin said, ancient people may have felt tied to the landscape in a way that might be hard for many modern Westerners to understand.
难以理解的抽象表述使我对学习感到厌烦。
The difficulty of grasping abstract statements made my learning very tiresome.
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