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题库 / OG2017V-SC-288
Sound can travel through water for enormous distances, prevented from dissipating its acoustic energy as a result of boundaries in the ocean created by water layers of different temperatures and densities.
prevented from dissipating its acoustic energy as a result of
prevented from having its acoustic energy dissipated by
its acoustic energy prevented from dissipating by
its acoustic energy prevented from being dissipated as a result of
preventing its acoustic energy from dissipating by
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E没有被动语态需要用到by
AD as a result 不对
B sound is prevented from（ having its acoustic energy dissipated） by boundaries
C its acoustic energy is prevented from dissipating by boundaries
对比BC，B的意思不对，boundaries 是帮助sound走更远的，而不是损害它的，并且by 既可以是接着prevented又可以是接着dissipated歧义
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