grows three times faster than elsewhere. 生长速度是别处的三倍
..and they are changing faster than ever before in human history. 而且正以人类历史上前所未有的速度变化
At one day old, they're already faster than an Olympic sprinter. 第一天 他们的速度就已经超过人类短跑健将
and they're doing so faster than ever before. 而且在以史无前例的速度变化着
they do so three times faster than normal. 它们发育的速度达到平时的三倍