但是他好像并没有听到。只有窗外风吹拂过树的沙沙声和雨点落在屋顶上的滴答声打破了这诡异的安宁。
But he seemed not to hear. Only the shiver of wind in the trees and the tittering of rain on the thatched roof broke that eerie silence.
在我们关门时听到滴答声，我们就知道锁上了，而没有声音则表示还不保险。
When we close the door, we know that it is latched when we hear the click, but silence tells us that it is not yet secure .
反馈不必是复杂的，那些滴答声并没有告诉我们很多信息，但是它们必须是一致的。
The feedback doesn't have to be sophisticated—those clicks don't tell us much—but they must be consistent.
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