So faint had been the noise that no one thought that the ship had been damaged.
此句的第一段是句子的主干，第二段是that引导的结果状语从句；第一段是关注的重点，So+adj/adv 置于句首采用倒装结构，表示强调，正常的语序形式是The noise had been so faint that...
翻译：声音是如此的轻微，以至于没有人想到这艘船已遭到损坏
