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. A. prevented from dissipating its acoustic energy as a result of B. prevented from having its acoustic energy dissipated by C. its acoustic energy prevented from dissipating by D. its acoustic energy prevented from being dissipated as a result of E preventing its acoustic energy from dissipating by
答案是E,但是这个prevent的动作应该应该是由boundary发起的吧,使用现在分词会不会不妥呢? |