求翻译：简支梁桥的优点：能就地取材、工业化施工耐久性好、适应性强、整体性好以及美观等许多优点。预应力混凝土梁桥更兼有节省钢材和跨越能力大的长处。 缺点：自重大，截面尺寸的，大大限制了其跨越能力。是什么意思？

Simply supported beam bridge Advantages: can make the best of the industrialized construction and good durability, adaptability, integrity, and aesthetics, and many other advantages. Prestressed concrete girder bridge, both to save the great strengths of steel and spanning capacity. Disadvantages: S

Charpy bridge advantages: can be obtained locally, industrialized construction durability, adaptability, and overall good looks, and many other benefits. prestressed concrete beam bridge and steel and save significant strengths beyond capacity. Disadvantages: The major, cross-sectional dimensions of

Simple support beam bridge merit: Can make use of local materials, the industrialization construction durability good, the compatibility strong, the integrity good as well as artistic and so on many merits.The prestressed concrete beam bridge furthermore has the economical steel products and the spa

Advantages of simply-supported girder Bridge: local, industrial construction and good durability, adaptability, overall good and beautiful and so many advantages. Prestressed concrete girder bridges also have the ability to save steel and spanning much of merit. Disadvantages: heavy section size, gr

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