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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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注意倒装：acoustic energy prevented from dissipating by...等于boundary prevent acoustic energy from dissipating.
sound不能prevent它声能的分散E out，也不是被prevent from声能分散的宾语，AB out
dissipate的主语也不是sound，因此用了ing无主语的形式
先把原句还原一下：当dissipate 是一个不及物动词：1）boundaries prevent its acoustic energy from dissipating当dissipate 是一个及物动词：2）boundaries prevent sound from dissipating its acoustic energy.把1）改到装：its acoustic energy is prevent from dissipating把2）改到装：its acoustic energy is prevent from being dissipated
Dissipating is not a transitive verb, 不及物动词后不能直接跟有动作的对象（即宾语）。若不及物动词后要跟宾语，必须先在其后添加上某个介词，如to,of, at后方可跟上宾语
找出intended meaning
A/B选项的意思是“sound be prevented from dissipating”，这在逻辑意义上错误，不是sound be prevented from dissipating，而是the energy of sound be prevented from dissipating。排除A/B。E选项表达的是sound prevent its acoustic energy from dissipating，逻辑意思错误，而应是boundaries prevent its acoustic energy from dissipating。排除E。C/D选项是独立主格结构with + 名词 + done + 介词，此处省略with。D选项being多余，且as a result of用法出错，即不是boundaries的结果保护了acoustic energy。排除D。正确选项C。
prevent的动作发出者是boundaries in the ocean, 不是sound