The technologies themselves, and their makers, are the easiest suspects to blame for our diminishing attention spans.
技术本身，以及它们的制造者，最容易被怀疑是造成我们注意力持续下降的罪魁祸首。
2
These episodes of rapid evolution are separated by relatively long static spans during which a species may hardly change at all.
这些快速进化的阶段被相对较长的静态跨度分隔开来，在此期间，一个物种几乎不会发生任何变化。
3
The world's largest existing marine reserve, established last year by the British government in the Indian Ocean, spans 554,000 km2 and is a no take zone throughout.