As we discussed last time, this thing filling up your fat cells is insulin.

正如我们上次所讨论的，这种把脂肪细胞填满脂肪的东西就是胰岛素。

More specifically, something isn't just filling your fat cells up with fat, but it's pinning that fat there and preventing it from being pulled out of the fat cell to be burned up for energy.

说的更具体些，这些东西不仅将脂肪细胞填满脂肪，而且还会将脂肪固定在那些脂肪细胞中，并阻止其作为人体的能量来源。