translation.en: One of the disadvantages of doing that is, as you scale things up -- so if you have lots of robots carrying the same thing, you're essentially increasing the inertia, and therefore you pay a price; they're not as agile.
translation.zh: 这样做的一个不便之处 就是当加大数量时—— 比如使用很多飞行器来抬一个物体 你其实是加大了惯性 这样它们就不够灵活了，这是一个代价