数值效应是明显的：退化地区的鲑鱼数量比原始地区少；然而，栖息地的丧失也有可能减少遗传多样性。
The numerical effect is obvious: there are fewer salmon in degraded regions than in pristine ones; however, habitat loss also has the potential to reduce genetic diversity.
研究者认为声调听障是一种遗传的音乐感知系统退化病症。
Researchers regard tone deafness an inherited disruption of a brain network that decodes musical pitch.
通过进一步的研究，节奏听障或许可以作为一种特别的音乐失调症归入声调听障。研究者认为声调听障是一种遗传的音乐感知系统退化病症。
With further research, beat deafness may join tone deafness as a music-specific disorder. Researchers regard tone deafness an inherited disruption of a brain network that decodes musical pitch.
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