杜甫《古柏行》有句云:“大厦如倾要栋梁,万牛回首丘山重。”意谓如大厦将倾需以古柏为栋梁,则此重如山丘之古柏,虽万牛亦难移。句意易解,然深究“万牛回首”四字,则有疑义存焉。盖“回首”两字如按常例释为回头看,则寓轻松悠闲之态,显与诗义不合;如解为无可奈何之状,则何不径 Du Fu “Cooper line” has a saying goes: “Buildings such as leaning pillars, Wanniu look back Qiu Shan heavy.” Means that if the building will be tilted to Cooper pillars, then the weight of such as Cooper Hill, Difficult to move. Sentence intended easy solution, however, study “Wanniu look back” four words, there are doubts in Yan. Cover “look back” as usual, if the words back to look at the interpretation of the state of relaxed and relaxed state, was inconsistent with the poem; if no solution to the shape of what, then why not path