imperceptibility是什么意思

n.没法感知,看不见,细微

1. The imperceptibility of the changes in his behavior made it difficult to detect any underlying issues.
他行为变化的难以察觉使得很难察觉到其中的潜在问题。

2. The imperceptibility of the scent made it impossible for the dog to track the missing person.
气味的难以察觉使得狗无法追踪失踪者。

难以察觉；难以感知