名著探讨的是人生长期未解决的问题。
Great books deal with the persistently unsolved problems of human life.
名著探讨的是人生长期未解决的问题。
在长期应用全髋关节置换，骨水泥和水泥假体植入后局部骨质流失仍然是一个未解决的问题。
Local bone loss after cementless and cemented implantation of prostheses remains an unsolved problem during the long-term application of total hip replacement.
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