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17.《The longest suspension bridge in the world
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Verrazano, an Italian about whom little is known, sailed into New York Harbour
in 1524 and named it Angouleme. He described it as 'a very agreeable situation
located within two small hills in the midst of which flowed a great river.'
Though Verrazano is by no means considered to be a great explorer, his name
will probably remain immortal, for on November 21st, 1964, the longest
suspension bridge in the world was named after him.#
The Verrazano Bridge, which was designed by Othmar Ammann, joins Brooklyn to
Staten Island. It has a span of 4,260 feet. The bridge is so long that the
shape of the earth had to be taken into account by its designer. Two great
towers support four huge cables. The towers are built on immense underwater
platforms made of steel and concrete. The platforms extend to a depth of over
100 feet under the sea. These alone took sixteen months to build. Above the
surface of the water, the towers rise to a height of nearly 700 feet. They
support the cables from which the bridge has been suspended. Each of the four
cables contains 26,108 lengths of wire. It has been estimated that if the
bridge were packed with cars, it would still only be carrying a third of its
total capacity. However, size and strength are not the only important things
about this bridge. Despite its immensity, it is both simple and elegant,
fulfilling its designer's dream to create 'an enormous object drawn as faintly
as possible'.&
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