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最近,日本竹中工务店研制成一种寿命长达五百年之久的新型混凝土。有关人士认为,这是具有划时代意义的创新成果。
Recently, the Takenaka Public Works Store in Japan developed a new type of concrete with a life expectancy of up to five hundred years. The person concerned believes that this is an epoch-making innovation.