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中国高架桥种满爬山虎，究竟有何妙用？难道不怕侵蚀桥体？
在城市中，高架桥几乎已经成为缓解城市交通压力的重要方式了，然而在中国许多城市高架桥下方的水泥墩上却种满了爬山虎，那么这些爬山虎究竟有何妙用呢？
【诸葛小彻】11/524
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