How to understand 100 expression shape keys?

[forrest-lam]

I have run successfully on my own audio, and I exported the flame pkl file. However, after I loaded the pkl file by pickle, I found there are 100 expression weights in every frame. How to understand the 100 expression weights? Are there expression names for each weight, just like the ARKit blendshape?

By the way, I am researching how the convert the Flame expressions to ARKit blendshape weight, but their lengths are different, one is 100, the other is 52. Anyone has good solution?