2. 外语
  3. 石拱桥的桥洞成弧形，就像虹。古代神话里说，雨后彩虹是“人间天上的桥”，通过彩虹就能上天。我国的诗人爱把拱桥比作虹，说拱桥是“卧虹”“飞虹”，把水上拱桥形容为“长虹卧波”。 石拱桥在世界桥梁史上出现得比较早。这种桥不但形式优美，而且结构坚固，能几十年

石拱桥的桥洞成弧形，就像虹。古代神话里说，雨后彩虹是“人间天上的桥”，通过彩虹就能上天。我国的诗人爱把拱桥比作虹，说拱桥是“卧虹”“飞虹”，把水上拱桥形容为“长虹卧波”。 石拱桥在世界桥梁史上出现得比较早。这种桥不但形式优美，而且结构坚固，能几十年

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问题     石拱桥的桥洞成弧形，就像虹。古代神话里说，雨后彩虹是“人间天上的桥”，通过彩虹就能上天。我国的诗人爱把拱桥比作虹，说拱桥是“卧虹”“飞虹”，把水上拱桥形容为“长虹卧波”。
    石拱桥在世界桥梁史上出现得比较早。这种桥不但形式优美，而且结构坚固，能几十年几百年甚至上千年雄跨在江河之上，在交通方面发挥作用。
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答案 The bridge opening of a stone arch bridge is in the shape of an arch and looks like a rainbow. Ancient legend has it that the rainbow after rain is "the bridge linking heaven and earth" , which serves as the road to sky. The particular image of an arch bridge as a rainbow is preferred by Chinese poets, for example, " a crouching rainbow" "a flying rainbow" , or "a long rainbow lying on waves" to refer to an arch bridge over a body of water. Historically speaking, stone arch bridges appear quite early in the world. Being not only graceful in form but also firm in structure, stone arch bridges that cross rivers can last for decades, centuries or even more than thousands of years and still function in public transportation.
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