translation.en: And the bacteria synchronize quite well at this scale, but because the molecule that synchronizes them together can only travel so fast, in larger colonies of bacteria, this results in traveling waves between bacteria that are far away from each other, and you can see these waves going from right to left across the screen.
translation.zh: 在这个尺度下， 细菌同步表现得很好， 但因为这些让细菌同步的分子 移动速度非常快， 在比较大的菌落里， 将导致在相距较远的细菌个体间 产生传导波动， 你可以看到这样的波动 从荧幕的右边向左移动。