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科学素养与生活应用·英语30篇(9)

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Why Bridges Don’t Fall Down

Why Bridges Don’t Fall Down

为什么桥不会塌下来

  1. Engineers draw strong shapes like triangles and arches.
  2. Steel and concrete hold heavy cars and trains safely.
  3. Pillars go deep into solid ground or rock.
  4. Waves, wind, and quakes are tested before building.
  5. Small models help test real bridge strength.
  6. Regular checks keep bridges safe for years.
  7. Good design + good care = safe crossing.
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